[Matplotlib-users] How to use specgram() window function?

[Klonuo U. <kl...@gm...>]

I want to use kaiser window that's part of numpy for drawing spectrogram

specgram(x, NFFT=256, Fs=2, Fc=0, detrend=mlab.detrend_none,
           window=mlab.window_hanning, noverlap=128,
           cmap=None, xextent=None, pad_to=None, sides='default',
           scale_by_freq=None, **kwargs)

*window*: callable or ndarray
    A function or a vector of length *NFFT*. To create window
    vectors see :func:`window_hanning`, :func:`window_none`,
    :func:`numpy.blackman`, :func:`numpy.hamming`,
    :func:`numpy.bartlett`, :func:`scipy.signal`,
    :func:`scipy.signal.get_window`, etc. The default is
    :func:`window_hanning`.  If a function is passed as the
    argument, it must take a data segment as an argument and
    return the windowed version of the segment.

So I tried:

Pxx, freqs, bins, im = specgram(x, NFFT=1024, Fs=fs, window=kaiser,
noverlap=2)
TypeError: kaiser() takes exactly 2 arguments (1 given)

Pxx, freqs, bins, im = specgram(x, NFFT=1024, Fs=fs, window=kaiser(x, 8),
noverlap=2)
ValueError: The truth value of an array with more than one element is
ambiguous. Use a.any() or a.all()

Pxx, freqs, bins, im = specgram(x, NFFT=1024, Fs=fs, window=blackman,
noverlap=2)
ValueError: The truth value of an array with more than one element is
ambiguous. Use a.any() or a.all()

Can someone help?

Thanks