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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).

.. cssclass:: table-bordered

.. rst-class:: midvalign
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.