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[MRG] raw.plot_psd() with flat channel #3342

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Merged
agramfort merged 2 commits into from
Jun 29, 2016
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Merged

[MRG] raw.plot_psd() with flat channel #3342

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918a097
TEST raw.plot_psd() with flat channel
christianbrodbeck Jun 26, 2016
254d971
ENH: catch error in raw.plot_psd() with dead channels
christianbrodbeck Jun 27, 2016
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6 changes: 6 additions & 0 deletions mne/viz/raw.py
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Original file line number Diff line number Diff line change
Expand Up @@ -575,6 +575,12 @@ def plot_raw_psd(raw, tmin=0., tmax=np.inf, fmin=0, fmax=np.inf, proj=False,
# Convert PSDs to dB
if dB:
psds = 10 * np.log10(psds)
if np.any(np.isinf(psds)):
where = np.flatnonzero(np.isinf(psds.min(1)))
chs = [raw.ch_names[i] for i in picks[where]]
raise ValueError("Infinite value in PSD for channel(s) %s. "
"These channels might be dead." %
', '.join(chs))
unit = 'dB'
else:
unit = 'power'
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3 changes: 3 additions & 0 deletions mne/viz/tests/test_raw.py
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Expand Up @@ -151,6 +151,9 @@ def test_plot_raw_psd():
# topo psd
raw.plot_psd_topo()
plt.close('all')
# with a flat channel
raw[5, :] = 0
assert_raises(ValueError, raw.plot_psd)


def test_plot_sensors():
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