ValueError: Could not find any of the events you specified.

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1

I am trying to deal with my EEG data by this documentation:
https://mne.tools/stable/auto_examples/decoding/decoding_csp_eeg.html
when I switch the data sort to my EEG data through this:

#LOAD DATA
subj = 'S1'
f_name = f'{subj}_mi1.cnt'
data_path = os.path.join('../data/eeg/S1/')
raw = mne.io.read_raw_cnt(os.path.join(data_path, f_name), preload=True)
# drop bad channels
raw.drop_channels(['left chn', 'rigth chn', 'M1', 'M2', 'CB1', 'CB2'])
print(raw.info['ch_names'])
raw.plot()
plt.show()
#raw_fnames = eegbci.load_data(subject, runs)
#raw = concatenate_raws([read_raw_edf(f, preload=True) for f in raw_fnames])
eegbci.standardize(raw)  # set channel names
montage = make_standard_montage('standard_1005')
raw.set_montage(montage)

# strip channel names of "." characters
raw.rename_channels(lambda x: x.strip('.'))

# Apply band-pass filter
raw.filter(7., 30., fir_design='firwin', skip_by_annotation='edge')

events, _ = events_from_annotations(raw, event_id=dict(T1=2, T2=3))

picks = pick_types(raw.info, meg=False, eeg=True, stim=False, eog=False,
                   exclude='bads')

# Read epochs (train will be done only between 1 and 2s)
# Testing will be done with a running classifier
epochs = Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks,
                baseline=None, preload=True)
epochs_train = epochs.copy().crop(tmin=1., tmax=2.)
labels = epochs.events[:, -1] - 2

it comes with the error:

ValueError: Could not find any of the events you specified.

dont know where goes wrong and how to fix this?

2

Apparently there are no annotations with descriptions T1 and T2 in raw.annotations.

You can check raw.annotations, or simply not pass event_id to events_from_annotations().

Best wishes,
Richard

3

when I switch to:

events, _ = events_from_annotations(raw, event_id='auto')

and

events, _ = events_from_annotations(raw, event_id=None)

it comes with:

ValueError: No matching events found for feet (event id 3)
Used Annotations descriptions: ['1', '2']

the code is:

events, _ = events_from_annotations(raw, event_id='auto')

picks = pick_types(raw.info, meg=False, eeg=True, stim=False, eog=False,
                   exclude='bads')

# Read epochs (train will be done only between 1 and 2s)
# Testing will be done with a running classifier
epochs = Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks,
                baseline=None, preload=True)
epochs_train = epochs.copy().crop(tmin=1., tmax=2.)
labels = epochs.events[:, -1] - 2
4

I don’t know where the error you’re reporting occurs. You need to provide the full traceback (the entire stack of error message)

5

my code:

# strip channel names of "." characters
raw.rename_channels(lambda x: x.strip('.'))

# Apply band-pass filter
raw.filter(7., 30., fir_design='firwin', skip_by_annotation='edge')

events, _ = events_from_annotations(raw, event_id='auto')

picks = pick_types(raw.info, meg=False, eeg=True, stim=False, eog=False,
                   exclude='bads')

# Read epochs (train will be done only between 1 and 2s)
# Testing will be done with a running classifier
print(str(event_id)+'test')
epochs = Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks,
                baseline=None, preload=True)
epochs_train = epochs.copy().crop(tmin=1., tmax=2.)
labels = epochs.events[:, -1] - 2

error text:

Used Annotations descriptions: ['1', '2']
{'hands': 2, 'feet': 3}test
Traceback (most recent call last):
  File "C:\Users\22100\Desktop\SCNS3\code\decoding_csp_eeg.py", line 54, in <module>
    epochs = Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks,
  File "<decorator-gen-206>", line 24, in __init__
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\epochs.py", line 2196, in __init__
    super(Epochs, self).__init__(
  File "<decorator-gen-196>", line 24, in __init__
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\epochs.py", line 423, in __init__
    _on_missing(on_missing, msg)
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\utils\check.py", line 732, in _on_missing
    raise ValueError(msg)
ValueError: No matching events found for feet (event id 3)
6

You should use the event_id returned from events_from_annotations() (currently you’re ignoring it by assigning it to _) instead of creating and passing your own. It doesn’t match your events array.

7

and when I change T1,T2(event_id) to 1 and 2,like this:


events, _ = events_from_annotations(raw, event_id=dict(T1=1,T2=2))

picks = pick_types(raw.info, meg=False, eeg=True, stim=False, eog=False,
                   exclude='bads')

# Read epochs (train will be done only between 1 and 2s)
# Testing will be done with a running classifier
print(str(event_id)+'test')
epochs = Epochs(raw, events, event_id, tmin, tmax, proj=True, picks=picks,
                baseline=None, preload=True)
epochs_train = epochs.copy().crop(tmin=1., tmax=2.)
labels = epochs.events[:, -1] - 2

it comes with:


Traceback (most recent call last):
  File "C:\Users\22100\Desktop\SCNS3\code\decoding_csp_eeg.py", line 46, in <module>
    events, _ = events_from_annotations(raw, event_id=dict(T1=1,T2=2))
  File "<decorator-gen-50>", line 24, in events_from_annotations
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\annotations.py", line 1021, in events_from_annotations
    event_sel, event_id_ = _select_annotations_based_on_description(
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\annotations.py", line 875, in _select_annotations_based_on_description
    raise ValueError('Could not find any of the events you specified.')
ValueError: Could not find any of the events you specified.
8

What you need to do is something like

events, event_id = events_from_annotations(raw)
epochs = Epochs(raw, events=events, event_id=event_id)
9

in my data,it should be: {‘hands’: 2, ‘feet’: 3}
when I changed the code as:

events, _ = events_from_annotations(raw)

picks = pick_types(raw.info, meg=False, eeg=True, stim=False, eog=False,
                   exclude='bads')

# Read epochs (train will be done only between 1 and 2s)
# Testing will be done with a running classifier
print(str(event_id)+'test')
epochs = Epochs(raw, events=events, event_id=event_id, tmin=-1, tmax=4, proj=True, picks=picks,
                baseline=None, preload=True)
epochs_train = epochs.copy().crop(tmin=1., tmax=2.)
labels = epochs.events[:, -1] - 2

it comes with


Traceback (most recent call last):
  File "C:\Users\22100\Desktop\SCNS3\code\decoding_csp_eeg.py", line 54, in <module>
    epochs = Epochs(raw, events=events, event_id=event_id, tmin=-1, tmax=4, proj=True, picks=picks,
  File "<decorator-gen-206>", line 24, in __init__
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\epochs.py", line 2196, in __init__
    super(Epochs, self).__init__(
  File "<decorator-gen-196>", line 24, in __init__
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\epochs.py", line 423, in __init__
    _on_missing(on_missing, msg)
  File "C:\Users\22100\PycharmProjects\pythonProject\venv\lib\site-packages\mne\utils\check.py", line 732, in _on_missing
    raise ValueError(msg)
ValueError: No matching events found for feet (event id 3)
Used Annotations descriptions: ['1', '2']
{'hands': 2, 'feet': 3}test

how to use annotations as [‘2’,‘3’]

10

oh I solved, there is a label at the front of the code, after changed it worked