﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>C++博客-I believe-随笔分类-Matlab</title><link>http://www.cppblog.com/luyulaile/category/19055.html</link><description>I  can</description><language>zh-cn</language><lastBuildDate>Fri, 07 Dec 2012 10:12:09 GMT</lastBuildDate><pubDate>Fri, 07 Dec 2012 10:12:09 GMT</pubDate><ttl>60</ttl><item><title>矩阵乘法的意义</title><link>http://www.cppblog.com/luyulaile/archive/2012/12/05/196013.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Wed, 05 Dec 2012 10:44:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/12/05/196013.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/196013.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/12/05/196013.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/196013.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/196013.html</trackback:ping><description><![CDATA[<div> <img src="file:///C:\users\yilu\AppData\Tencent\Users\349826924\QQ\WinTemp\RichOle\{NB9CE}[L5OABB`L$N7RJK3.jpg" alt="" /><img src="file:///C:\users\yilu\AppData\Tencent\Users\349826924\QQ\WinTemp\RichOle\{NB9CE}[L5OABB`L$N7RJK3.jpg" alt="" /><img src="http://www.cppblog.com/images/cppblog_com/luyulaile/未命名12.5.jpg" border="0" alt="" width="893" height="563" /><br />相当于A(B <strong>x</strong>)&nbsp;<br /></div><img src ="http://www.cppblog.com/luyulaile/aggbug/196013.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-12-05 18:44 <a href="http://www.cppblog.com/luyulaile/archive/2012/12/05/196013.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>多维矩阵 求和</title><link>http://www.cppblog.com/luyulaile/archive/2012/10/27/193940.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Sat, 27 Oct 2012 05:11:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/10/27/193940.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/193940.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/10/27/193940.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/193940.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/193940.html</trackback:ping><description><![CDATA[<div>&gt;&gt; test3=cat(3,test1,test2)</div><div></div><div>test3(:,:,1) =</div><div></div><div>&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2</div><div>&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4</div><div></div><div></div><div>test3(:,:,2) =</div><div></div><div>&nbsp; &nbsp; &nbsp;5 &nbsp; &nbsp; 6</div><div>&nbsp; &nbsp; &nbsp;7 &nbsp; &nbsp; 8</div><br />=======================================<br /><div>&gt;&gt; sum(test3,1) &nbsp; %对第一个维度求和</div><div></div><div>ans(:,:,1) =</div><div></div><div>&nbsp; &nbsp; &nbsp;4 &nbsp; &nbsp; 6</div><div></div><div></div><div>ans(:,:,2) =</div><div></div><div>&nbsp; &nbsp; 12 &nbsp; &nbsp;14</div><div></div><div>&gt;&gt; sum(test3,2) &nbsp;%对第二个维度求和</div><div></div><div>ans(:,:,1) =</div><div></div><div>&nbsp; &nbsp; &nbsp;3</div><div>&nbsp; &nbsp; &nbsp;7</div><div></div><div></div><div>ans(:,:,2) =</div><div></div><div>&nbsp; &nbsp; 11</div><div>&nbsp; &nbsp; 15<br /><br /><div>&gt;&gt; sum(test3,3)%相当于对第三个维度上求和</div><div></div><div>ans =</div><div></div><div>&nbsp; &nbsp; &nbsp;6 &nbsp; &nbsp; 8</div><div>&nbsp; &nbsp; 10 &nbsp; &nbsp;12</div></div><div></div><div>&gt;&gt; sum(test3(:))</div><div></div><div>ans =</div><div></div><div>&nbsp; &nbsp; 36</div><div></div><img src ="http://www.cppblog.com/luyulaile/aggbug/193940.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-10-27 13:11 <a href="http://www.cppblog.com/luyulaile/archive/2012/10/27/193940.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>matlab 矩阵合并</title><link>http://www.cppblog.com/luyulaile/archive/2012/10/27/193939.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Sat, 27 Oct 2012 04:31:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/10/27/193939.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/193939.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/10/27/193939.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/193939.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/193939.html</trackback:ping><description><![CDATA[<div>&gt;&gt; test1=[1,2;3,4]</div><div></div><div>test1 =</div><div></div><div>&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2</div><div>&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4</div><div></div><div>&gt;&gt; test2=[5,6;7,8]</div><div></div><div>test2 =</div><div></div><div>&nbsp; &nbsp; &nbsp;5 &nbsp; &nbsp; 6</div><div>&nbsp; &nbsp; &nbsp;7 &nbsp; &nbsp; 8</div><div></div><div>&gt;&gt; test3=[test1,test2]</div><div></div><div>test3 =</div><div></div><div>&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2 &nbsp; &nbsp; 5 &nbsp; &nbsp; 6</div><div>&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4 &nbsp; &nbsp; 7 &nbsp; &nbsp; 8</div><div></div><div>&gt;&gt; test4=[test1;test2]</div><div></div><div>test4 =</div><div></div><div>&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2</div><div>&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4</div><div>&nbsp; &nbsp; &nbsp;5 &nbsp; &nbsp; 6</div><div>&nbsp; &nbsp; &nbsp;7 &nbsp; &nbsp; 8<br />===<br /><div style="margin: 0px; word-wrap: break-word; font-family: Tahoma, Helvetica, SimSun, sans-serif, Hei; line-height: 25px; background-color: #ffffff; ">对于维数相同的矩阵</div><div style="margin: 0px; word-wrap: break-word; font-family: Tahoma, Helvetica, SimSun, sans-serif, Hei; line-height: 25px; background-color: #ffffff; ">cat(1,A,B）相当于[A;B]</div><div style="margin: 0px; word-wrap: break-word; font-family: Tahoma, Helvetica, SimSun, sans-serif, Hei; line-height: 25px; background-color: #ffffff; ">cat (2, A, B) 相当于[A,B]</div><div style="margin: 0px; word-wrap: break-word; font-family: Tahoma, Helvetica, SimSun, sans-serif, Hei; line-height: 25px; background-color: #ffffff; ">cat (3, A, B) 相当于增加维度</div><div style="margin: 0px; word-wrap: break-word; background-color: #ffffff; "><font face="Tahoma, Helvetica, SimSun, sans-serif, Hei"><span style="line-height: 25px;">当A，B分别为二维矩阵时，合并之后为三维矩阵；A,B为三维矩阵，则在第三维方向上合并A,B。</span></font><br /><br /><div><span style="line-height: 25px;">&gt;&gt; cat(1,test1,test2)</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">ans =</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;5 &nbsp; &nbsp; 6</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;7 &nbsp; &nbsp; 8</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&gt;&gt; cat(2,test1,test2)</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">ans =</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2 &nbsp; &nbsp; 5 &nbsp; &nbsp; 6</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4 &nbsp; &nbsp; 7 &nbsp; &nbsp; 8</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&gt;&gt; cat(3,test1,test2)</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">ans(:,:,1) =</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 2</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 4</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">ans(:,:,2) =</span></div><div><span style="line-height: 25px;"><br /></span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;5 &nbsp; &nbsp; 6</span></div><div><span style="line-height: 25px;">&nbsp; &nbsp; &nbsp;7 &nbsp; &nbsp; 8</span></div></div></div><div></div><img src ="http://www.cppblog.com/luyulaile/aggbug/193939.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-10-27 12:31 <a href="http://www.cppblog.com/luyulaile/archive/2012/10/27/193939.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Matlab 常用画图公式</title><link>http://www.cppblog.com/luyulaile/archive/2012/10/12/193194.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Thu, 11 Oct 2012 20:31:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/10/12/193194.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/193194.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/10/12/193194.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/193194.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/193194.html</trackback:ping><description><![CDATA[<div itemprop="content" style="margin: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: #ffffff; font-family: Arial, Helvetica, sans-serif; line-height: 19px; "><h1><a href="http://www.mathworks.com/help/matlab/ref/plot.html">http://www.mathworks.com/help/matlab/ref/plot.html</a>&nbsp;<br /><br />例子：<br /><br /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">还是举简单的例子个大家：在0&#8804;x&#8804;2p区间内，绘制曲线y1=2e-0.5x和y2=cos(4&#960;x)，并给图形添加图形标注。&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">x=0:pi/100:2*pi;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">y1=2*exp(-0.5*x);</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">y2=cos(4*pi*x);</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">plot(x,y1,x,y2)</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">title('x from 0 to 2{\pi}');&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; %加图形标题&nbsp; &nbsp;&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">xlabel('Variable X');&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;%加X轴说明&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">ylabel('Variable Y');&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;%加Y轴说明&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">text(0.8,1.5,'曲线y1=2e^{-0.5x}');&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; %在指定位置添加图形说明&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">text(2.5,1.1,'曲线y2=cos(4{\pi}x)');&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">legend('y1','y2')&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;%加图例&nbsp;</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><span style="color: red; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; line-height: 25px; background-color: #ffffff; ">复制代码</span><br style="line-height: 25px; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " /><img height="420" alt="" src="http://attach.matlabsky.com/data/attachment/album/201106/02/16190800lmx99j5uflb9iq.jpg" width="561" style="line-height: 25px; border: 0px; max-width: 100%; color: #959595; font-family: Arial, Helvetica, simsun, u5b8bu4f53; font-size: 14px; font-weight: normal; background-color: #000000; " />&nbsp;<br /><br />plot</h1><div style="margin: -20px 0px 20px; padding-top: 3px; border-top-width: 0px; border-right-width: 0px; border-left-width: 0px; border-bottom-style: none; outline: 0px; font-size: 0.9em; vertical-align: baseline; background-color: transparent; color: #6a6a6a; line-height: 14px; "><p itemprop="purpose" style="margin: 0px 0px 20px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; ">2-D line plot</p></div></div><h2>Syntax</h2><div style="margin: 0px 0px 15px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: #ffffff; width: 560px; font-family: Arial, Helvetica, sans-serif; line-height: 19px; "><p style="margin: 0px 0px 20px 32px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">plot(Y)<br />plot(X1,Y1,...,Xn,Yn)<br />plot(X1,Y1,<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1em; vertical-align: baseline; background-color: transparent; ">LineSpec</tt>,...,Xn,Yn,<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1em; vertical-align: baseline; background-color: transparent; ">LineSpec</tt>)<br />plot(...,'<em style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1em; vertical-align: baseline; background-color: transparent; ">PropertyName</tt></em>',PropertyValue,...)<br />plot(axes_handle,...)<br />h = plot(...)<br /><br /><br /><strong style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">&nbsp; &nbsp;1、设置图线宽度</strong><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">&nbsp;</span><wbr style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; "><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">&nbsp;</span><wbr style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; "><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">&nbsp;</span><wbr style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; "><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">set( haxis, 'LineWidth', 1.0 );&nbsp;</span><wbr style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; "><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; background-color: transparent; font-size: 1.2em; ">----这是 set函数， 'LineWidth'就是axis的线宽度属性，其值默认为0.5，这里可以改成1.0了。</span></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><strong>2、调整坐标轴上下限<br /></strong>set( haxis, 'XLim', [ 2 20 ] );&nbsp;<wbr>&nbsp;<wbr>set( haxis, 'YLim', [ 2 20 ] );---调整坐标轴上下限的。Z轴，那同理set( haxis, 'ZLim', [ Zmin, %% Zmax ] )<br /><strong>&nbsp; &nbsp; &nbsp;3、调整坐标轴上的标注数字</strong><br />set( haxis, 'XTick', 2:1:20 );&nbsp;<wbr>&nbsp;<wbr>set( haxis, 'YTick', 2:1:20 );----是调整坐标轴上那些标注出来的数字了，2:1:20意思是从2开始，每隔1标注一次，直到20为止。注意这里的2, 20最好和上面相应的XLim, YLim最大最小值一致。</tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><strong>4、MATLAB中提供的线型及颜色属性：</strong></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><strong>如：plot(x1,y1,'r-'),表示，用红色实线画出图形</strong></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">&nbsp;<wbr></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">&nbsp;<wbr></tt></p><table border="1" cellspacing="0" cellpadding="0" style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; font-size: 14px; text-align: left; text-indent: 28px; padding: 0px; margin: 0px; "><tbody><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>线型</p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>说明</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>标记符</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>说明</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>颜色</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>说明</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>-</p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>实线(默认)</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>+</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>加号符</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>r</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>红色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>--</p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>双划线</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>o</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>空心圆</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>g</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>绿色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>:</p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>虚线</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>*</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>星号</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>b</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>蓝色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>:.</p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>点划线</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>.</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>实心圆</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>c</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>青绿色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>x</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>叉号符</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>m</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>洋红色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>s</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>正方形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>y</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>黄色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>d</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>菱形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>k</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>黑色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>^</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>上三角形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>w</p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>白色</p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>v</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>下三角形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&gt;&nbsp;<wbr></p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>右三角形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&lt;&nbsp;<wbr></p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>左三角形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>p</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>五角星</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td></tr><tr><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="96" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td><td width="95" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>h</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>六边形</p></td><td width="93" style="padding: 0px; line-height: 18px; margin: 0px; font-family: Verdana, 宋体, sans-serif; font-size: 12px; "><p>&nbsp;<wbr></p></td></tr></tbody></table><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">&nbsp;<wbr></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><strong>5、图形标题、轴标注、图形说明的设置</strong></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">图名标注可用：title('xx关系图')<br />axis([0,22,0,3]);---显示范围为：X轴从0-22， Y轴从0-3显示。<br />xlabel('电压（V）')，ylabel('电流（A）') 分别表示在X轴下标示 电压（V），Y轴旁标示&#8220;电流（A）&#8221;</tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">legend('A曲线 ','B曲线','C曲线')&nbsp;<wbr>&nbsp;<wbr>用于说明图中的曲线的说明，顺序和plot(x1,y1,x2,y2,x3,y3)的曲线1、2、3相同即可。</tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">&nbsp;<wbr></tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">set(h,'LineWidth',1.5)%设置图线粗细</tt></p><p style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">%set(gca,'XTickLabel',{'-4/T','-3/T','-2/T','-1/T','0','1/T','2/T','3/T','4/T',})<br /><br /><br /><br /><br /></tt></p><div itemprop="content" style="margin: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; color: #000000; font-family: Arial, Helvetica, sans-serif; line-height: 19px; text-indent: 0px; "><h1><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">scatter</tt></h1><div style="margin: -20px 0px 20px; padding-top: 3px; border-top-width: 0px; border-right-width: 0px; border-left-width: 0px; border-bottom-style: none; outline: 0px; font-size: 0.9em; vertical-align: baseline; background-color: transparent; color: #6a6a6a; line-height: 14px; "><p itemprop="purpose" style="margin: 0px 0px 20px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">Scatter plot</tt></p></div></div><div itemprop="content" style="margin: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; color: #000000; font-family: Arial, Helvetica, sans-serif; line-height: 19px; text-indent: 0px; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><a name="bquk_8i" style="margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; color: rgb(0, 95, 206); "></a><h2></h2><p style="margin: 0px 0px 20px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; "><img src="http://www.mathworks.com/help/matlab/ref/plottype-scatter.gif" height="46" width="60" alt="" style="margin: 0px; padding: 0px; border: none; outline: 0px; vertical-align: baseline; background-color: transparent; " /></p></tt></div><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; "><a name="f33-615582" style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; color: rgb(0, 95, 206); font-family: Arial, Helvetica, sans-serif; line-height: 19px; text-indent: 0px; "></a><h2>Syntax</h2><div style="margin: 0px 0px 15px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; width: 560px; color: #000000; font-family: Arial, Helvetica, sans-serif; line-height: 19px; text-indent: 0px; "><p style="margin: 0px 0px 20px 32px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background-color: transparent; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; line-height: 18px; background-position: initial initial; background-repeat: initial initial; ">scatter(X,Y,S,C)<br />scatter(X,Y)<br />scatter(X,Y,S)<br />scatter(...,<em style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1em; vertical-align: baseline; background-color: transparent; ">markertype</tt></em>)<br />scatter(...,'filled')<br />scatter(...,'<em style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; "><tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1em; vertical-align: baseline; background-color: transparent; ">PropertyName</tt></em>',propertyvalue)<br />scatter(axes_handle,...)<br />h = scatter(...)</tt></p></div></tt><p>&nbsp;</p><p>&nbsp;</p></div><img src ="http://www.cppblog.com/luyulaile/aggbug/193194.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-10-12 04:31 <a href="http://www.cppblog.com/luyulaile/archive/2012/10/12/193194.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Matlab 常用function 笔记</title><link>http://www.cppblog.com/luyulaile/archive/2012/10/11/193145.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Thu, 11 Oct 2012 00:28:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/10/11/193145.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/193145.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/10/11/193145.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/193145.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/193145.html</trackback:ping><description><![CDATA[repmat(A, 2 *3) 负责A 2*3<br />eye(1) [1] &nbsp;eye(2) 2*2的单位矩阵<br />ones(n), &nbsp;n*n的矩阵<br />ones(n,m) 或者 ones([n,m]) n*m全是1的矩阵<br />zeros(n) zeros([n,m]) &nbsp;全是0的矩阵<br /><br />reshape() 将数据一列一列重新分配<br />例如：<br /><pre style="margin-top: 0px; margin-bottom: 20px; margin-left: 32px; padding: 0px; border: 0px; outline: 0px; font-size: 12px; vertical-align: baseline; background-color: #ffffff; white-space: pre-wrap; word-wrap: break-word; line-height: 19px; "> <p style="margin: 0px 0px 20px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; font-family: Arial, Helvetica, sans-serif; white-space: normal; ">Reshape a&nbsp;<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; ">3</tt>-by-<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; ">4</tt>&nbsp;matrix into a<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; ">&nbsp;2</tt>-by-<tt style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.2em; vertical-align: baseline; background-color: transparent; background-position: initial initial; background-repeat: initial initial; ">6</tt>&nbsp;matrix.</p><pre style="margin-top: 0px; margin-bottom: 20px; margin-left: 32px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; white-space: pre-wrap; word-wrap: break-word; ">A =     1    4    7    10<br />        2    5    8    11<br />        3    6    9    12            <br /><br />B = reshape(A,2,6)            <br />B =     1    3    5    7    9   11     <br />        2    4    6    8   10   12 <br />B = reshape(A,2,[])</pre> 
<pre style="margin-top: 0px; margin-bottom: 20px; margin-left: 32px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; white-space: pre-wrap; word-wrap: break-word; ">B =     1    3    5    7    9   11     <br />        2    4    6    8   10   12 </pre>
</pre><br /><br /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">A=rand(3,3);</span><br style="word-wrap: break-word; color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; " /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">B=A';%转置</span><br style="word-wrap: break-word; color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; " /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">C=inv(B);%求逆</span><br style="word-wrap: break-word; color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; " /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">D=rank(A);%求矩阵的置</span><br style="word-wrap: break-word; color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; " /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">[V E]=eig(A);%求矩阵的特征向量V和特征值D</span>&nbsp;<br /><span style="color: #444444; font-family: Tahoma, 'Microsoft Yahei', Simsun; background-color: #ffffff; ">如果不是方阵，可以用pinv求伪逆</span>&nbsp;<br /><br />圆括号的作用：用于取值（引用数组中的元素）<br /><div>&gt;&gt; A =[1 &nbsp; &nbsp;4 &nbsp; &nbsp;7 &nbsp; &nbsp;10</div><div>&nbsp; &nbsp; 2 &nbsp; &nbsp;5 &nbsp; &nbsp;8 &nbsp; &nbsp;11</div><div>&nbsp; &nbsp; 3 &nbsp; &nbsp;6 &nbsp; &nbsp;9 &nbsp; &nbsp;12]</div><div></div><div>A =</div><div></div><div>&nbsp; &nbsp; &nbsp;1 &nbsp; &nbsp; 4 &nbsp; &nbsp; 7 &nbsp; &nbsp;10</div><div>&nbsp; &nbsp; &nbsp;2 &nbsp; &nbsp; 5 &nbsp; &nbsp; 8 &nbsp; &nbsp;11</div><div>&nbsp; &nbsp; &nbsp;3 &nbsp; &nbsp; 6 &nbsp; &nbsp; 9 &nbsp; &nbsp;12<br />A(3)=3<br />A(10)=10<br />A(2,3)=5<br />注意不是；而是逗号,<br />A(2,:)=去所有的第二行 2 5 8 11<br /><br /><br /><br />方括号的作用：<br /><pre id="best-answer-content"  mb10"="" data-accusearea="aContent" style="margin-top: 0px; margin-bottom: 10px; padding: 0px; font-family: Arial; white-space: pre-wrap; word-wrap: break-word; zoom: 1; line-height: 22px; font-size: 14.166666030883789px; background-color: #fffcf6; ">Matlab 方括号&#8220;[ ]&#8221;的作用<br /> 1定义矩阵（向量，数组）。<br />                例如 a=[1 2 3;4 5 6] <br />2.定义函数的返回参数列表（输出变量宗量）。<br />               例如 [m,n]=size(a)                如果函数的返回参数只有一个，中括号一般省略。即  [n]=rand(1,2); 可写作  n=rand(1,2);</pre><br /><br /><code style="color: #222222; line-height: 28px; text-indent: 28px; ">大括号的作用{ }<br />大括号，用于cell型的数组的分配或引用。<br />比如</code>&nbsp;<code style="color: #222222; line-height: 28px; text-indent: 28px; ">A(2,1) = {[1 2 3; 4 5 6]}</code><span style="color: #222222; font-family: tahoma, Verdana, Arial, 宋体; line-height: 28px; text-indent: 28px; ">, or&nbsp;</span><code style="color: #222222; line-height: 28px; text-indent: 28px; ">A{2,2} = ('str')</code>&nbsp;<br /><br />分号；的作用：<br /><br /><br />cell型 数据类型<br /><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">如果p为一个数，那么h(1)=p,是没有问题的。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">如果p为一个向量，那么h(1,:)=p是没有问题的。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">如果p是一个矩阵的话，上面的两种赋值方法都是会有错误的。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">那么要如何处理呢？</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">这时就用到了cell数据类型了。cell的每个单元都可以存储任何数据，比如传递函数等。当然，存储矩阵更是没有问题的了。但是用cell数据类型之前，要先初始化。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">a=cell(n,m)</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">那么就把a初始化为一个n行m列的空cell类型数据。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">如何赋值呢？</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">a{1,1}=rand(5)</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">那么a的1行1列的单元中存储的就是一个随机的5&#215;5的方阵了。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">那么要用第一个单元中的方阵中的某个值呢？</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">可以如下引用：a{1,1}(2,3)</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">就可以了，引用cell单元时要用{},再引用矩阵的某个数据就要用()了。</p><p style="margin: 0px; padding: 0px; color: #454545; font-family: 'Microsoft Yahei', 微软雅黑, Tahoma, Arial, Helvetica, STHeiti; font-size: 13.63636302947998px; line-height: 19.09090805053711px; background-color: #ffffff; ">cell单元中的每个单元都是独立的，可以分别存储不同大小的矩阵或不同类型的数据。</p></div><img src ="http://www.cppblog.com/luyulaile/aggbug/193145.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-10-11 08:28 <a href="http://www.cppblog.com/luyulaile/archive/2012/10/11/193145.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>matlab中求和函数sum的具体使用实例:</title><link>http://www.cppblog.com/luyulaile/archive/2012/04/10/170773.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Tue, 10 Apr 2012 06:20:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/04/10/170773.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/170773.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/04/10/170773.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/170773.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/170773.html</trackback:ping><description><![CDATA[<p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">matlab中求和函数sum的具体使用实例:</span></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">a=sum(A)&nbsp;</span><wbr>&nbsp;<wbr><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">%列求和</span></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">b=sum(A,2) %行求和</span></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">c=sum(A(:)) %矩阵求和</span></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">假定A为一个矩阵：</span></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; "><span goog_qs-tidbit-0"="" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: inline !important; background-color: #ffffdd; color: #000000; text-decoration: inherit; ">sum(A)以矩阵A的</span>每一列为对象，对一列内的数字求和。</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">sum(A,2)以矩阵A的每一行为对象，对一行内的数字求和。</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">a(:,1)是求矩阵的第一列</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">a(1,:)是求矩阵的第一行，以此类推。通过下面的例子，可以明白：</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr></p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; a=[1 2 3; 4 5 6; 7 8 9]</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">a =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;1&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;2&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;3</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;4&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;5&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;6</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;7&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;8&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;9</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; sum(a)</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">ans =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;12&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;15&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;18</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; a(1,:)</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">ans =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;1&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;2&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;3</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; sum(a,2)</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">ans =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;6</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;15</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;24</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; sum(a(:))</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">ans =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;45</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&gt;&gt; a(:,1)</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">ans =</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;1</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;4</p><p style="font-family: 宋体; font-size: 12px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: #333333; text-align: left; background-color: #ffffff; text-indent: 2em; ">&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;<wbr>&nbsp;7</p><img src ="http://www.cppblog.com/luyulaile/aggbug/170773.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-04-10 14:20 <a href="http://www.cppblog.com/luyulaile/archive/2012/04/10/170773.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Matlab生成服从正态分布的随机数</title><link>http://www.cppblog.com/luyulaile/archive/2012/04/10/170765.html</link><dc:creator>luis</dc:creator><author>luis</author><pubDate>Tue, 10 Apr 2012 04:43:00 GMT</pubDate><guid>http://www.cppblog.com/luyulaile/archive/2012/04/10/170765.html</guid><wfw:comment>http://www.cppblog.com/luyulaile/comments/170765.html</wfw:comment><comments>http://www.cppblog.com/luyulaile/archive/2012/04/10/170765.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cppblog.com/luyulaile/comments/commentRss/170765.html</wfw:commentRss><trackback:ping>http://www.cppblog.com/luyulaile/services/trackbacks/170765.html</trackback:ping><description><![CDATA[<table style="table-layout: fixed; font-family: Arial; width: 930px; "><tbody><tr><td style="word-wrap: break-word; word-break: break-all; visibility: visible !important; zoom: 1 !important; filter: none; font-size: 12px; line-height: 18px; "><div id="blog_text" style="word-wrap: break-word; word-break: break-all; visibility: visible !important; zoom: 1 !important; filter: none; overflow-x: hidden; overflow-y: hidden; position: relative !important; border-image: initial; ">功能：生成服从正态分布的随机数<br />语法：<br />R＝normrnd(MU,SIGMA)<br />R＝normrnd(MU,SIGMA,m)<br />R＝normrnd(MU,SIGMA,m,n)<p style="line-height: normal; ">&nbsp;&nbsp;说 明：<br />R＝normrnd(MU,SIGMA)：生成服从正态分布(MU参数代表均值，DELTA参数代表标准差)的随机数。输入的向量或矩阵MU和SIGMA必须形式相同，输出R也和它们形式相同。标量输入将被扩展成和其它输入具有 相同维数的矩阵。</p><p style="line-height: normal; ">&nbsp;&nbsp;R＝norrmrnd(MU,SIGMA,m)：生成服从正态分布(MU参数代表均值，DELTA参数代表标准差)的 随机数矩阵，矩阵的形式由m定义。m是一个1&#215;2向量，其中的两个元素分别代表返回值R中行与列的维数。</p><p style="line-height: normal; ">&nbsp;&nbsp;R＝normrnd(MU,SIGMA,m,n)： 生成m&#215;n形式的正态分布的随机数矩阵。</p></div></td></tr></tbody></table><img src ="http://www.cppblog.com/luyulaile/aggbug/170765.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.cppblog.com/luyulaile/" target="_blank">luis</a> 2012-04-10 12:43 <a href="http://www.cppblog.com/luyulaile/archive/2012/04/10/170765.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>