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annotate extra codes/lab2_4.m @ 3:1c0f36c348d4

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extra code for matlab
author Katerina <katkost@gmail.com>
date Sat, 20 Apr 2013 13:03:01 +0100
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katkost@3 1 N=1024;
katkost@3 2 t = [0:1/44100:0.1-1/44100];
katkost@3 3 x1=cos(2*pi*100*44100/1024*t);
katkost@3 4 x801 = x1(1:801);
katkost@3 5 xlength=length(x801);
katkost@3 6 fftbuffer=zeros(N, 1);
katkost@3 7 fftbuffer(1:(xlength+1)/2) = x801((xlength+1)/2:xlength);
katkost@3 8 fftbuffer(N-(xlength-1)/2+1:N) = x801(1: (xlength-1)/2);
katkost@3 9 plot(unwrap(angle(fftbuffer,1024)));