fft moving window problem

I'd like to perform moving window fft on my signal. I'd like to use hamming window first, and then try hanning. I started writing the code, however I dont know how to save and merge data from each fft in the loop. I'll be very grateful to any suggestions. The code is:

x = sig;         % my signal
  nx = length(x);                           % size of signal
  w = hamming(32);                          % hamming window
  nw = length(w);                           % size of window
  pos=1;

    while (pos+nw <= nx)                      % while enough signal left
            y = x(pos:pos+nw-1).*w;           % make window y

            %%%%process window y %%%%
            yy = fft(y,32);
            pos = pos + nw/2;                 % next window

    end

thanks in advance, KK

Answer 1

[Daniel Shub]

You should have a look at SPECTROGRAM.

[Pengxiang Huang]

spectrogram doe not fit for his purpose totally, you may miss a lot of consideration such as computation burden.

Answer 2

[Katarzyna]

I am analysing spectrogram too, but in this case I would like to perform fft n times on the m parts of the signal. I can see in my head a moving window of 64samples with increment e.g 32samples (50% overlap). I dont know how to save and merge fft results from each step.

[Daniel Shub]

This should be a comment on my answer, and not a new answer. Have you read the documentation of SPECTROGRAM. This is exactly what the function does.

[Pengxiang Huang]

did you finally solve it