more details on attempt to associate raw data with coordinate xform

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1

Here is what I just tried:

2

Well, you should be able to see by digging into the file in either the
matlab or python toolbox.

D

Jeff Eriksen wrote:

3

I found mne_show_fiff, and verified that gsn257-trans.fif has a reasonable
looking xform matrix inside, and the EEG file, A1_smpl_raw.fif has the EEG
data as well as the electrode coordinates. So I still do not understand
why I get the error message below.

Thanks,

-Jeff

4

This is the result of mne_show_fiff on gsn257-trans.fif:

kje-macbook:MNE jefferiksen$ mne_show_fiff --in gsn257-trans.fif --verbose
100 = file ID 1.3 0x304122003198 Wed Apr 4 18:04:57 2012
101 = dir pointer 212
106 = free list -1
222 = transform head -> MRI (surface RAS)
                           0.99973 -0.02116 -0.00973 -0.83
                           0.01910 0.98386 -0.17793 -8.54
                           0.01334 0.17769 0.98400 -15.80
                           0.00000 0.00000 0.00000 1.00
108 = NOP

-Jeff

5

Attached is a text file with the result of running mne_sho_fiff on my EEG
data file.
-Jeff

Well, you should be able to see by digging into the file in either the
matlab or python toolbox.

D

Jeff Eriksen wrote:

Here is what I just tried:

*************************************************************************
***************

Mne_browse_raw

File:Open A1_smpl_raw.fif -> 257 EEG channels display correctly

Windows:Start mne_analyze -> Window appears for ?load a new data set?

-> Preselected file is A1_smpl_raw.fif, "OK"

Select MRI/MEG transform source: gsn257-trans.fif (which I created
yesterday)

"OK", "OK"

Loading ?

A problem appeared ? some EEG channels do not have location information

*************************************************************************
**************

I cannot fathom why any EEG channel would not have location info. Is
there a way to dump the gsn257?trans.fif file so I can examine its
contents?

Thanks,

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6

hello jeff,

the log seem fine. You have data buffers in the fif file.

if you still have the problem can you share a bad fif file ?
also maybe the original file before conversion to fif?

Best,
Alex