Matlab - hamming windowing

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Author

hamming windowing

nicola

2005-11-30, 4:02 am

I have a problem with looping hamming window upon a signal (in my
case vocerun, which is a struct array, file wav).when i try to run my
code,it gives me error into the while cycle, saying

??? Undefined function or variable 'y'.

could someone help me please?i listed my code below:

figure(1);
fs = 22050;
N = length(vocerum.data);
t = (0:1:(N-1))/fs;
subplot(2,1,1), plot(t,vocerum.data); title('segnale prelevato');
xlabel('tempo'); ylabel('ampiezza'); grid on

w = hamming(N)';
nw = length(w);

pos = 1;
while (pos + nw <= N) %while enough signal left
y = vocerum.data(pos:(pos+nw-1)).*w; %make window
pos = pos + nw/2; %next window
end
subplot(2,1,2), plot(y);

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