%8-4  ʹsubplotжͼĻơ

>> x = 0:.1:20;
>> subplot(2,2,1)
>> plot(x,sin(x));
>>
  

>> x = 0:.1:20;
>> subplot(2,2,2)
>> plot(x,cos(x));
>>
 

>> subplot(2,2,3)
>> x = 0:.1:2;
>> y1=tan(x);
>> plot(x,y1,'--b*');
>>
