Compute FFT consecutively in Matlab

I have an array of numbers in variable "filter". I wanted to compute Fourier Transform (fft) on every 32 data consecutively using matlab. But the codes below doesn't seems to work. Anyone have a better solution?

   for aa=1:length(filter)-32        %scans every row of numbers

      output(aa) = fft(filter(aa + (0:31)));   % compute fft every 32 data continuously      

   end

Answer 1

[Youssef Khmou]

hi, First remark is the name of the variable "filter" is built-in function, this will lead to ambiguity, the other problem is you are iterating with a step of 32 points but you expect to store 32 points in 1 element, the partition in the right must be the same in the left :

   for aa=1:length(X)-32        %scans every row of numbers
      output(aa+(0:31)) = fft(X(aa + (0:31)));
   end

output is complex vector.

Answer 2

[Greg Heath]

output(aa) is a scalar

output(aa,:) is a row vector

Hope this helps.

Thank you for formally accepting my answer

Greg

[Youssef Khmou]

this is another option to store nx32 matrix like a spectrogram.