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Re: query about function output
Posted:
Dec 26, 2013 7:22 AM


"Dhanashree " <dhanurane17@gmail.com> wrote in message news:l9evr9$sbm$1@newscl01ah.mathworks.com... > "Loren Shure" wrote in message <l9c8pl$sqb$1@newscl01ah.mathworks.com>... >> "Dhanashree " <dhanurane17@gmail.com> wrote in message >> news:l9bb9t$kbi$1@newscl01ah.mathworks.com...
>> dB is either a function that you have or a variable you haven't shown us >> yet. It looks like it's meant to be a decibel calculation, but without >> the code, hard to say... >> >> >> >>  >> Loren >> >> http://blogs.mathworks.com/loren > ok.....i am giving you the whole program i have.It is basically program to > plot spectrogram.plz explain it to me. > > M=256; > B=floor(N/M); > x_mat=reshape(x(1:M*B),[M B]); > hamming(M); > win_mat=repmat(hamming(M),[1 B]); > x_fft=(x_mat.*win_mat); > y=abs(x_fft(1:M/2,:)); > t=(1:B)*(M/fs); > f=((0:M1)/(M1)*(fs/2)); > f; > %bark=frq2bark(f); > %bark=13.*atan(0.00076*f)+3.5.*atan((f/7500)^2); > figure(2); > imagesc(t,f,dB(y)); > colormap(jet); > colorbar; > set(gca,'ydir','normal'); > xlabel('Time(sec)'); > ylabel('Frequency(Hz)'); > title('Spectrogram');
As stated earlier and with this code, it looks like dB must be a function. In MATLAB, try
which dB
to see if there's such a file on your matlabpath. Then you can either get help for it or edit it to see what it does.
Loren
http://blogs.mathworks.com/loren



