MATLAB 图中图

有时为了在一个较大坐标轴上一个一个小图来说明局部方法的结果，可以调用axes函数实现这个要求。下面通过绘制 y=1/(t-3) 的曲线举例说明该函数的做法。程序如下：

%                                                                                                                                                                
clc;clear;close all;                                                                                                                                     
figure;% 生成新的图形窗口                                                                                                                    
t=linspace(0,6,300);t1=linspace(2.8,3.2,300); % 生成曲线的整体离散坐标值t和局部离散坐标值t1                                                                                                                                                                 
y=sin(1./[t-3]);y1=sin(1./[t1-3]); % 生成曲线的整体离散函数值y和局部离散函数值y1                 
plot(t,y);axis('equal'); % 绘制整体曲线图                                                                                               
axes('Position',[0.18,0.62,0.28,0.25]); % 生成子图                                                                              
plot(t1,y1); % 绘制局部曲线图                                                                                                                
xlim([min(t1),max(t1)]); % 设置坐标轴范围                                                                                            
set(gcf,'Color','w');

另外:   subplot('Position',[left bottom width height]  也可产生类似的功能 ！