mne.find_stim_steps#

mne.find_stim_steps(raw, pad_start=None, pad_stop=None, merge=0, stim_channel=None)[source]#

Find all steps in data from a stim channel.

Parameters

rawRaw object: The raw data.
pad_startNone | int: Values to assume outside of the stim channel (e.g., if pad_start=0 and the stim channel starts with value 5, an event of [0, 0, 5] will be inserted at the beginning). With None, no steps will be inserted.
pad_stopNone | int: Values to assume outside of the stim channel, see pad_start.
mergeint: Merge steps occurring in neighboring samples. The integer value indicates over how many samples events should be merged, and the sign indicates in which direction they should be merged (negative means towards the earlier event, positive towards the later event).
stim_channelNone | str | list of str: Name of the stim channel or all the stim channels affected by the trigger. If None, the config variables ‘MNE_STIM_CHANNEL’, ‘MNE_STIM_CHANNEL_1’, ‘MNE_STIM_CHANNEL_2’, etc. are read. If these are not found, it will default to ‘STI101’ or ‘STI 014’, whichever is present.

Returns

stepsarray, shape = (n_samples, 3): For each step in the stim channel the values [sample, v_from, v_to]. The first column contains the event time in samples (the first sample with the new value). The second column contains the stim channel value before the step, and the third column contains value after the step.