subplot.txt

Matlab绘制子图函数的使用

t=linspace(0,0.1,641); 
w=2*pi*50; 
ia=sin(w*t)+sin(5*w*t); 
ib=sin(w*t-2*pi/3)+sin(5*w*t+2*pi/3); 
ic=sin(w*t+2*pi/3)+sin(5*w*t-2*pi/3); 
> plot(t,ia); 
> plot(t,ib); 
> plot(t,ic); 
> id=zeros(1,128); 
> iq=zeros(1,128); 
> i0=zeros(1,128); 
id=0.6667*(ia.*cos(w*t)+ib.*cos(w*t-(2*pi/3))+ic.*cos(w*t+(2*pi/3))); 
iq=0.6667*(ia.*(-sin(w*t))+ib.*(-sin(w*t-2*pi/3))+ic.*(-sin(w*t+2*pi/3))); 
i0=(ia+ib+ic)/3; 
id1=zeros(1,641); 
iq1=zeros(1,641); 
i01=zeros(1,641); 
for i=3:1:641; 
id1(i)=0.000095060029449*(id(i)+2*id(i-1)+id(i-2))+1.972233729195266*id1(i-1)-0.972613969313063*id1(i-2); 
iq1(i)=0.000095060029449*(iq(i)+2*id(i-1)+iq(i-2))+1.972233729195266*iq1(i-1)-0.972613969313063*iq1(i-2); 
i01(i)=0.000095060029449*(i0(i)+2*id(i-1)+i0(i-2))+1.972233729195266*i01(i-1)-0.972613969313063*i01(i-2); 
end 
> id1=id; 
> iq1=iq; 
> i01=i0; 
iaf=2*(id1.*cos(w*t)+iq1.*(-sin(w*t))+0.5*i01); 
ibf=2*(id1.*cos(w*t-2*pi/3)+iq1.*(-sin(w*t-2*pi/3))+0.5*i01); 
icf=2*(id1.*cos(w*t+2*pi/3)+iq1.*(-sin(w*t+2*pi/3))+0.5*i01); 
subplot(4,3,1); 
plot(t,ia); 
subplot(4,3,2); 
plot(t,ib); 
subplot(4,3,3); 
plot(t,ic); 
subplot(4,3,4); 
plot(t,iaf); 
subplot(4,3,5); 
plot(t,ibf); 
subplot(4,3,6); 
plot(t,icf); 
subplot(4,3,7); 
plot(t,id); 
subplot(4,3,8); 
plot(t,id1); 
subplot(4,3,9); 
plot(t,iq); 
subplot(4,3,10); 
plot(t,iq1); 
subplot(4,3,11); 
plot(t,i0) 
subplot(4,3,12); 
plot(t,i01); 

> > y4=zeros(1,128); 
> > 
> y4(1)=0; 
> y4(2)=0; 
> for i=1:1:126; 
> y4(i+2)=(y3(i)+2*y3(i+1)+y3(i+2)-y4(i)-1.28*y4(i+1))/0.48; 
> end 
> y4 
> plot(t,y4)