Matlab demo running error, help debug please

[neoflash]

errors in matlab demos

There is a Matlab demo in help file on PSD.

fs = 1000; % Sampling frequency
t = (0:fs)/fs; % One second worth of samples
xn = sin(2*pi*50*t);
Hs = spectrum.periodogram('Hamming');
psd(Hs,xn,'Fs',fs,'NFFT',1024,'SpectrumType','twoside')

[Pxxo,F] = psd(Hs,xn,'Fs',fs,'SpectrumType','onesided');
Pow = (fs/(2*length(Pxxo))) * sum(Pxxo)

However, during running, it reported error as:

??? Error using ==> psd
Too many output arguments.

Error in ==> psd_test2 at 7
[Pxxo,F] = psd(Hs,xn,'Fs',fs,'SpectrumType','onesided');

what is wrong with this demo?

thanks.

 

[mro83]

Hi
I tested the codes in MATLAB 7 and it worked well.
here is the graph.
cheers

 

[neoflash]

what is the value you get for POW?

 

[mro83]

Hi
ecuse me if the file wasn't uploaded my system cannot properly upload the file.
as i read matlab help, psd cannot output frequency as it's written and it creates an object data .
try command :'pwelch' instead.