www.pudn.com > matlab&c(1).rar > testscript.m

%testscript.m 
x = -pi:0.01:pi; %pi在MATLAB中是是常量，代表圆周率 
y = sin(x);%生成绘制数据 
ynoise = y + (rand(1,length(y))-0.5)*0.2;%加均匀噪声 
plot(x,y,'r.'); 
hold on;%重复绘制不擦除背景 
plot(x,ynoise); 
hold off;