Matlab7的?Error using ==> mrdivide Matrix dimensions must agree.a=1;b=1;k=1;x=1:0.1:20;NA=-pi/2k/(asin(a/x)+(a/x).sqrt(1-(a/x).^2));w=1:0.01:200;K=10;num=K;den=conv([0.5 1 0],[0.2 1]);[rem,img,w]=Nyquist(num,den,w);plot(real(NA),img(NA),rem,img)gr

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Matlab7的?Errorusing==>mrdivideMatrixdimensionsmustagree.a=1;b=1;k=1;x=1:0.1:20;NA=-pi/2*k/(asin(a/x)

Matlab7的?Error using ==> mrdivide Matrix dimensions must agree.a=1;b=1;k=1;x=1:0.1:20;NA=-pi/2*k/(asin(a/x)+(a/x).*sqrt(1-(a/x).^2));w=1:0.01:200;K=10;num=K;den=conv([0.5 1 0],[0.2 1]);[rem,img,w]=Nyquist(num,den,w);plot(real(NA),img(NA),rem,img)gr
Matlab7的?Error using ==> mrdivide Matrix dimensions must agree.
a=1;
b=1;
k=1;
x=1:0.1:20;
NA=-pi/2*k/(asin(a/x)+(a/x).*sqrt(1-(a/x).^2));
w=1:0.01:200;
K=10;
num=K;
den=conv([0.5 1 0],[0.2 1]);
[rem,img,w]=Nyquist(num,den,w);
plot(real(NA),img(NA),rem,img)
grid;
xlabel('Re');
ylabel('Im');
NA那部分的代码出了问题,我该如何修改这个程序?