Le lundi 30 janvier 2012 à 13:34 +0000, David Craig a écrit : > Hi, thanks for that. I've made the following changes: > > NFFT = 100*60*10 # Linked to window size > Fs = stream[0].stats.sampling_rate > win = np.hanning(NFFT) > overlap = NFFT/2 > power, freq = plt.psd(data, NFFT, Fs, win, overlap) > > but it returns the following error: > > Traceback (most recent call last): > File "/home/davcra/Desktop/python_scripts/welchPSD.py", line 20, in <module> > power, freq = plt.psd(data, NFFT, Fs, win, overlap) > File "/usr/lib/python2.7/site-packages/matplotlib/pyplot.py", line 2322, in > psd > ret = ax.psd(x, NFFT, Fs, Fc, detrend, window, noverlap, pad_to, sides, > scale_by_freq, **kwargs) > File "/usr/lib/python2.7/site-packages/matplotlib/axes.py", line 7876, in > psd > sides, scale_by_freq) > File "/usr/lib/python2.7/site-packages/matplotlib/mlab.py", line 389, in psd > scale_by_freq) > File "/usr/lib/python2.7/site-packages/matplotlib/mlab.py", line 419, in csd > noverlap, pad_to, sides, scale_by_freq) > File "/usr/lib/python2.7/site-packages/matplotlib/mlab.py", line 268, in > _spectral_helper > thisX = windowVals * detrend(thisX) > TypeError: 'int' object is not callable
Please be careful with argument order. Expected arguments for psd are - the data array - the NFFT value - the sampling frequency - the detrend callable (*missing in your example*) - and then the overlap number You should either specify on of the detrend pylab functions (detrend_none, detrend_mean, and detrend_linear) or use keyword arguments as I did in the example. -- Fabrice Silva ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
