basic_ops.crop_data#

autoclean.functions.preprocessing.basic_ops.crop_data(data, tmin=None, tmax=None, include_tmax=True)[source]#

Crop EEG data to a specific time range.

This function crops continuous (Raw) or epoched EEG data to a specified time window. Useful for focusing analysis on specific time periods or removing unwanted segments.

Parameters:

datamne.io.BaseRaw or mne.Epochs: The EEG data to crop.
tminfloat or None, default None: Start time in seconds. If None, uses the start of the data.
tmaxfloat or None, default None: End time in seconds. If None, uses the end of the data.
include_tmaxbool, default True: Whether to include the tmax time point.

Returns:

cropped_datamne.io.BaseRaw or mne.Epochs: Data cropped to the specified time range.

Raises:

TypeError: If data is not an MNE Raw or Epochs object.
ValueError: If tmin >= tmax or times are outside data range.

Examples

Crop to specific time window:

>>> from autoclean import crop_data
>>> cropped = crop_data(raw, tmin=10.0, tmax=60.0)  # Keep 10-60 seconds

Crop from beginning:

>>> cropped = crop_data(raw, tmax=30.0)  # Keep first 30 seconds

Crop to end:

>>> cropped = crop_data(raw, tmin=5.0)  # Remove first 5 seconds