How do I store the output

i=0;
for N=20:50
    T=0.1; NT=N*T; n=0:N; t=0:0.005:NT; nT=n*T; Fs=1/T;
    x1=cos(2*pi*nT);
    xt1=cos(2*pi*t);
    xhat=x1*sinc(Fs*(ones(length(n),1)*t-nT'*ones(1,length(t))));
    err=max(abs(xhat(ceil(end/3:end/3*2))-xt1(ceil(end/3):ceil(end/3*2))));
    i=i+1; 
    [errorarray(i)]=err;
end

Hello, I am new to matlab.

I wanna store the output of the error by incrasing sample N.

So, I wanna plot by (N,err)

For this, I need to make array of the output. However, MATLAB says, I have dimention error in my script.

I will be so happy to get some advise.

Have a good day!

Answer 1

[the cyclist]

When you index into xt1, you are using

ceil(end/3):ceil(end/3*2)

and when you index into xhat, you are using

ceil(end/3:end/3*2)

In the first iteration of your loop, the first expression evaluates to

134:268

and the second ones evaluates to

134:267

so you have a dimension mismatch when you try to subtract the two vectors.