vertcat CAT arguments dimensions are not consistent.

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raj
raj 2012-1-31
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
  1 个评论
raj
raj 2012-1-31
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

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回答（2 个）

Jan
Jan 2012-1-31
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?
raj
raj 2012-1-31
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
  1 个评论
raj
raj 2012-1-31
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

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