matlab函数作图

1. plot(x1,y1,'s1',x2,y2,'s2',...xn,yn,'sn')

   x、y为长度相同向量，s表示线型和颜色

   >> x=0:0.1:2*pi;

   >> y1=sin(x);
   

   >> y2=cos(x)

   >> plot(x,y1,'r',x,y2,'b');

2. subplot(m,n,k)

   多窗口作图，将窗口分为m×n个子窗口，当前图在第k个窗口完成。

   >> x=0:0.1:2*pi;

   >> y1=sin(x);

   subplot(2,2,1); plot(x,y1);title('y=sin(x)');grid on%设置标题，打开格网

   
   

3. hist直方图作图

   count=hist(X)

   count=hist(X,center)

   count=hist(X,number)

   [count,center]=hist(X)

   
   

   >> X=normrnd(10,5,1000,1);
   >> z=hist(X)
   
   
   z =
   
   
   4 27 88 190 270 243 123 38 13 4
   

   
   

   >> X=normrnd(10,5,1000,1);
   

   >> [count,center]=hist(X);
   >> bar(center,count);
   

   
   

4. grid二维图形绘制命令
   

   grid on

   grid off