[Mne_analysis] Read head position from .fif file

[Mainak Jas]

Hi Benoît,

I think you need a *.pos file not *.fif file to read the head position
(like the one attached). It's generated by maxfilter. Also, this is only
required if you plan to do movement compensation ...

Eric, shouldn't you be able to read the head position directly from the
*.fif files because you have the head_to_dev transforms?

Best regards,
Mainak

On Wed, Jul 13, 2016 at 5:29 PM, Benoît MARTIN <bmartin.neuro at gmail.com>
wrote:

> Dear all,
>
> I am actually trying to read the head position from my .fif file,
> but I get this error: "Could not convert string to float"
>
> here is my line of code:
>
>
> raw_fname = data_path + 'raw/cb140229_mag_run1.fif'
> # Read head position
> head_pos = mne.chpi.read_head_pos(raw_fname)      [error is at that point]
> raw_sss = maxwell_filter(raw, calibration=cal_fname,  cross_talk =
> ctc_fname, head_pos=None)
>
>
> I am wondering what I am doing wrong, or if I can read head position from
> the .fif file.
> Any help is welcome,
>
> Best,
> Benoît MARTIN
>
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>
>
> The information in this e-mail is intended only for the person to whom it
> is
> addressed. If you believe this e-mail was sent to you in error and the
> e-mail
> contains patient information, please contact the Partners Compliance
> HelpLine at
> http://www.partners.org/complianceline . If the e-mail was sent to you in
> error
> but does not contain patient information, please contact the sender and
> properly
> dispose of the e-mail.
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160713/1a4c5aca/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: simulated_quats.pos
Type: application/octet-stream
Size: 1380 bytes
Desc: not available
Url : http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160713/1a4c5aca/attachment.obj