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Supported data formats

When MNE-Python loads sensor data, the data are stored in a Python object of type :class:`mne.io.Raw`. Specialized loading functions are provided for the raw data file formats from a variety of equipment manufacturers. All raw data input/output functions in MNE-Python are found in :mod:`mne.io` and start with :samp:`read_raw_{*}`; see the documentation for each reader function for more info on reading specific file types.

As seen in the table below, there are also a few formats defined by other neuroimaging analysis software packages that are supported (EEGLAB, FieldTrip). Like the equipment-specific loading functions, these will also return an object of class :class:`~mne.io.Raw`; additional functions are available for reading data that has already been epoched or averaged (see table).

Data type	File format	Extension	MNE-Python function
MEG	:ref:`Artemis123 <import-artemis>`	.bin	:func:`mne.io.read_raw_artemis123`
MEG	:ref:`4-D Neuroimaging / BTi <import-bti>`	<dir>	:func:`mne.io.read_raw_bti`
MEG	:ref:`CTF <import-ctf>`	<dir>	:func:`mne.io.read_raw_ctf`
MEG and EEG	:ref:`Elekta Neuromag <import-neuromag>`	.fif	:func:`mne.io.read_raw_fif`
MEG	:ref:`FIL OPM MEG <import-fil>`	.bin	:func:`mne.io.read_raw_fil`
MEG	:ref:`KIT <import-kit>`	.sqd	:func:`mne.io.read_raw_kit`, :func:`mne.read_epochs_kit`
MEG and EEG	:ref:`FieldTrip <import-fieldtrip>`	.mat	:func:`mne.io.read_raw_fieldtrip`, :func:`mne.read_epochs_fieldtrip`, :func:`mne.read_evoked_fieldtrip`
EEG	:ref:`Brainvision <import-bv>`	.vhdr	:func:`mne.io.read_raw_brainvision`
EEG	:ref:`Biosemi data format <import-biosemi>`	.bdf	:func:`mne.io.read_raw_bdf`
EEG	:ref:`Neuroscan CNT <import-cnt>`	.cnt	:func:`mne.io.read_raw_cnt`
EEG	:ref:`European data format <import-edf>`	.edf	:func:`mne.io.read_raw_edf`
EEG	:ref:`EEGLAB <import-set>`	.set	:func:`mne.io.read_raw_eeglab`, :func:`mne.read_epochs_eeglab`
EEG	:ref:`EGI simple binary <import-egi>`	.egi	:func:`mne.io.read_raw_egi`
EEG	:ref:`EGI MFF format <import-mff>`	.mff	:func:`mne.io.read_raw_egi`
EEG	:ref:`eXimia <import-nxe>`	.nxe	:func:`mne.io.read_raw_eximia`
EEG	:ref:`General data format <import-gdf>`	.gdf	:func:`mne.io.read_raw_gdf`
EEG	:ref:`Nicolet <import-nicolet>`	.data	:func:`mne.io.read_raw_nicolet`
EEG	:ref:`Persyst <import-persyst>`	.lay	:func:`mne.io.read_raw_persyst`
NIRS	:ref:`NIRx <import-nirx>`	directory	:func:`mne.io.read_raw_nirx`
NIRS	:ref:`BOXY <import-boxy>`	directory	:func:`mne.io.read_raw_boxy`
EYETRACK	SR eyelink ASCII files	.asc	:func:`mne.io.read_raw_eyelink`

More details are provided in the tutorials in the :ref:`tut-data-formats` section.