http://blog.sina.com.cn/s/blog_401aa0540100ufl1.html

Matlab 绘图时， 可以通过 设置 "interpreter" 属性 显示数学公式。
E.g.
xlabel('$n$','interpreter','latex');
ylabel('${\gamma}$','interpreter','latex');
title('${\gamma}(n)$','interpreter','latex');
text(0.5,0.5, '$\int_{a}^{b}f(x)dx$', 'interpreter','latex');

h = legend('ours','$l_p$-norm MKL',1);
set(h,'Interpreter','latex');

h = legend('l1','DLSR-FS',4);
h1 = findobj(get(h,'Children'),'String','l1');
set(h1,'String','$l_1$','Interpreter','LaTex');

---------------------------如何在matlab中的xlabel，ylabel，legend和text函数中使用latex(以下关于legend的不必看，已到我的例二)---------------------------
http://blog.sina.com.cn/s/blog_6e0693f70100nj22.html

t = 0:0.1:2*pi;
x = sin(t);
hold on;
plot(t,x,'-*');
plot(t,2*x,'-.');
%% Using Latex in xlabel and ylabel
xlabel('$Time$','Interpreter','LaTex');
ylabel('$Value$','Interpreter','LaTex');
%% Using Latex in legend
h = legend('sin(x)__','2*sin(x)__');
h1 = findobj(get(h,'Children'),'String','sin(x)__');
set(h1,'String','$sin(\hat{x})$','Interpreter','LaTex');
h2 = findobj(get(h,'Children'),'String','2*sin(x)__');
set(h2,'String','$2*sin(\hat{x})$','Interpreter','LaTex');
%% Using Latex in text
text('Interpreter','latex',...
'String','$$\int_0^x\!\int_y dF(u,v)$$',...
'Position',[3 1],...
'FontSize',16);
%% Using Latex in title
title('$How \ to \ use \ latex \ in \ figure$','Interpreter','LaTex');