mne.io.read_raw_cnt¶

mne.io.read_raw_cnt(input_fname, montage, eog=(), misc=(), ecg=(), emg=(), data_format=’auto’, date_format=’mm/dd/yy’, preload=False, verbose=None)[source]¶

Read CNT data as raw object.

Note

If montage is not provided, the x and y coordinates are read from the file header. Channels that are not assigned with keywords eog, ecg, emg and misc are assigned as eeg channels. All the eeg channel locations are fit to a sphere when computing the z-coordinates for the channels. If channels assigned as eeg channels have locations far away from the head (i.e. x and y coordinates don’t fit to a sphere), all the channel locations will be distorted. If you are not sure that the channel locations in the header are correct, it is probably safer to use a (standard) montage. See mne.channels.read_montage()

Parameters:

Parameters:	input_fname : str Path to the data file. montage : str \| None \| instance of montage Path or instance of montage containing electrode positions. If None, xy sensor locations are read from the header (`x_coord` and `y_coord` in `ELECTLOC`) and fit to a sphere. See the documentation of `mne.channels.read_montage()` for more information. eog : list \| tuple \| ‘auto’ \| ‘header’ Names of channels or list of indices that should be designated EOG channels. If ‘header’, VEOG and HEOG channels assigned in the file header are used. If ‘auto’, channel names containing ‘EOG’ are used. Defaults to empty tuple. misc : list \| tuple Names of channels or list of indices that should be designated MISC channels. Defaults to empty tuple. ecg : list \| tuple \| ‘auto’ Names of channels or list of indices that should be designated ECG channels. If ‘auto’, the channel names containing ‘ECG’ are used. Defaults to empty tuple. emg : list \| tuple Names of channels or list of indices that should be designated EMG channels. If ‘auto’, the channel names containing ‘EMG’ are used. Defaults to empty tuple. data_format : ‘auto’ \| ‘int16’ \| ‘int32’ Defines the data format the data is read in. If ‘auto’, it is determined from the file header using `numsamples` field. Defaults to ‘auto’. date_format : str Format of date in the header. Currently supports ‘mm/dd/yy’ (default) and ‘dd/mm/yy’. preload : bool \| str (default False) Preload data into memory for data manipulation and faster indexing. If True, the data will be preloaded into memory (fast, requires large amount of memory). If preload is a string, preload is the file name of a memory-mapped file which is used to store the data on the hard drive (slower, requires less memory). verbose : bool, str, int, or None If not None, override default verbose level (see `mne.verbose()` and Logging documentation for more).
Returns:	raw : instance of RawCNT. The raw data.

input_fname : str

Path to the data file.

montage : str | None | instance of montage

Path or instance of montage containing electrode positions. If None, xy sensor locations are read from the header (x_coord and y_coord in ELECTLOC) and fit to a sphere. See the documentation of mne.channels.read_montage() for more information.

eog : list | tuple | ‘auto’ | ‘header’

Names of channels or list of indices that should be designated EOG channels. If ‘header’, VEOG and HEOG channels assigned in the file header are used. If ‘auto’, channel names containing ‘EOG’ are used. Defaults to empty tuple.

misc : list | tuple

Names of channels or list of indices that should be designated MISC channels. Defaults to empty tuple.

ecg : list | tuple | ‘auto’

Names of channels or list of indices that should be designated ECG channels. If ‘auto’, the channel names containing ‘ECG’ are used. Defaults to empty tuple.

emg : list | tuple

Names of channels or list of indices that should be designated EMG channels. If ‘auto’, the channel names containing ‘EMG’ are used. Defaults to empty tuple.

data_format : ‘auto’ | ‘int16’ | ‘int32’

Defines the data format the data is read in. If ‘auto’, it is determined from the file header using numsamples field. Defaults to ‘auto’.

date_format : str

Format of date in the header. Currently supports ‘mm/dd/yy’ (default) and ‘dd/mm/yy’.

preload : bool | str (default False)

Preload data into memory for data manipulation and faster indexing. If True, the data will be preloaded into memory (fast, requires large amount of memory). If preload is a string, preload is the file name of a memory-mapped file which is used to store the data on the hard drive (slower, requires less memory).

verbose : bool, str, int, or None

If not None, override default verbose level (see mne.verbose() and Logging documentation for more).

Returns:

raw : instance of RawCNT.

The raw data.