[Matplotlib-users] psd

Hi I have some data for a 24hr period with a sample rate of 100
samples/second. I want to create a power spectrum using matplotlibs
function psd. I want it to have 10 minute windows with a 50% overlap, but
cant seem to get the syntax right. My code is as follows:

NFFT = len(data)
Fs = 100
window=np.hanning(Fs*60*10)
noverlap = window*0.5
plt.psd(data, NFFT, Fs, window, noverlap )

anyone kow how to do this properly???

Thanks,
D