vertcat CAT arguments dimensions are not consistent.

I am implementing a code and exactly at the last loop after running for two iterations I have this error. I know this error is due to inconsistency in my arrays but i dont know where is the actual problem in the loop this is my code...

for tau = 1 : y
  for k = 0:nw-1
      S(1:nw,tau)= (((output(tau : tau + nw -1) - x(tau)).*exp(2*pi*k/nw))...
                      + (x(nw-1+ tau).*exp(-2*pi*k*(nw-1)/nw)));

        S = S(1:end/2);

    end
   Total = [Total; S.'];
end

[raj]

I have an error in this line Total = [Total; S.']; but as for my requirment that is right way any way to avoid this error

Answer 1

[Jan]

Is Total defined before the loops? If so, with which size?

It is strange, that you define S as a matrix at first and crop it to a vector in the next line. Are you sure?

Answer 2

[raj]

hallo Jan Simon this is my code may be it will help u in understanding better

    Fs = 5e3;
t = 0:1/Fs:(10*1/Fs)-1/Fs;
x = cos(2*pi*1000*t)+cos(2*pi*1007*t);
w = rectwin(6)';
nw= length(w);
output = zeros(size(x));
for k = 0:length(x)-1
    s= 0;
    for n = 0:length(x)-1
        s = s + x(n+1).*exp(-2*pi*1j*k*n/nw);
    end
       output(k+1) = s;
end
Total = [];
y = length(x) - nw;
  for tau = 1 : y
    for k = 0:nw-1
        S(1:nw,tau)= (exp(2*pi*k/nw).*(((output(tau : tau + nw -1) - x(tau)))...
                        + (x(nw-1+ tau).*exp(-(nw-1)/nw))));

        S = S(1:end/2);

    end
    Total = [Total; S.'];
end

[raj]

for tau = 1 the array works as i wanted but from tau = 2 the matrix dimensions change thats the problem any ideas how can i change the matrix dimensions