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Partial backport of pull request #7845 from vollbier/specgram_overlap_err #7855

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Merged
merged 1 commit into from
Jan 17, 2017
Merged

Partial backport of pull request #7845 from vollbier/specgram_overlap_err #7855

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6 changes: 5 additions & 1 deletion lib/matplotlib/axes/_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7190,8 +7190,12 @@ def specgram(self, x, NFFT=None, Fs=None, Fc=None, detrend=None,
if not self._hold:
self.cla()

if NFFT is None:
NFFT = 256 # same default as in mlab.specgram()
if Fc is None:
Fc = 0
Fc = 0 # same default as in mlab._spectral_helper()
if noverlap is None:
noverlap = 128 # same default as in mlab.specgram()

if mode == 'complex':
raise ValueError('Cannot plot a complex specgram')
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4 changes: 3 additions & 1 deletion lib/matplotlib/mlab.py
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Expand Up @@ -1275,7 +1275,9 @@ def specgram(x, NFFT=None, Fs=None, detrend=None, window=None,

"""
if noverlap is None:
noverlap = 128
noverlap = 128 # default in _spectral_helper() is noverlap = 0
if NFFT is None:
NFFT = 256 # same default as in _spectral_helper()

spec, freqs, t = _spectral_helper(x=x, y=None, NFFT=NFFT, Fs=Fs,
detrend_func=detrend, window=window,
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