generic msi/4D/bti support about mne-python

[dengemann]

Hi all,

meanwhile we made some progress with this and have a first working module that can be used to reproduce the original bti export_fiff program written for Solaris workstations given a bunch of ascii exported BTI files, that is the header, the headhape and the system device to head transform and the binary data. We could certainly improve this to directly operate on the BTI binary files but the difference in precision due to ascii only affects the transformations which are identical to about the 4 to 5th decimal and hence for the moment this is already nice. We could improve it later if we need.

https://gist.github.com/3d7cb168d5814aab5e5e

This practically means we can natively support data acquired on BTI / 4D MagnesWH3600 systems and I would like to contribute this to mne-python.

1. Add some command line option parsing to this and make it a scipt
2. Add an import / IO module with a bti submodule and put the Raw subclass and the functions there. Then call it from a script.

Also I think I could provide sample data and an example.

Wdyt?

[agramfort]

I would make it an mne_bti2fiff.py or mne_4d2fiff.py to convert the files to a fif file. To be put in the bin folder and adding it to the installed commands in setup.py

[dengemann]

Sounds good, so we will move to WIP. closing.