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DOC: Clearer error message #8631

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Merged
agramfort merged 1 commit into from
Dec 8, 2020
Merged

DOC: Clearer error message #8631

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5 changes: 3 additions & 2 deletions mne/minimum_norm/inverse.py
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Original file line number Diff line number Diff line change
Expand Up @@ -786,8 +786,9 @@ def _check_reference(inst, ch_names=None):
if ch_name in ch_names]
info = pick_info(info, sel=picks)
if _needs_eeg_average_ref_proj(info):
raise ValueError('EEG average reference is mandatory for inverse '
'modeling, use set_eeg_reference method.')
raise ValueError(
'EEG average reference (using a projector) is mandatory for '
'modeling, use the method set_eeg_reference(projection=True)')
if info['custom_ref_applied']:
raise ValueError('Custom EEG reference is not allowed for inverse '
'modeling.')
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2 changes: 1 addition & 1 deletion mne/minimum_norm/tests/test_inverse.py
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Original file line number Diff line number Diff line change
Expand Up @@ -523,7 +523,7 @@ def test_apply_inverse_operator(evoked, inv, min_, max_):
apply_inverse(evoked, inv_op, lambda2, "MNE")
evoked.info['custom_ref_applied'] = False
evoked.info['projs'] = [] # remove EEG proj
with pytest.raises(ValueError, match='EEG average reference is mandatory'):
with pytest.raises(ValueError, match='EEG average reference.*mandatory'):
apply_inverse(evoked, inv_op, lambda2, "MNE")

# But test that we do not get EEG-related errors on MEG-only inv (gh-4650)
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