<div dir="ltr"><div><div><div>Hi Benoît,<br><br></div>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 ...<br><br></div><div>Eric, shouldn't you be able to read the head position directly from the *.fif files because you have the head_to_dev transforms?<br></div><div><br></div>Best regards,<br></div>Mainak<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 13, 2016 at 5:29 PM, Benoît MARTIN <span dir="ltr"><<a href="mailto:bmartin.neuro@gmail.com" target="_blank">bmartin.neuro@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div>Dear all,<br><br></div>I am actually trying to read the head position from my .fif file,<br></div>but I get this error: "Could not convert string to float"<br><br></div>here is my line of code:<br><br><br>raw_fname = data_path + 'raw/cb140229_mag_run1.fif'<br># Read head position<br>head_pos = mne.chpi.read_head_pos(raw_fname) [error is at that point]<br>raw_sss = maxwell_filter(raw, calibration=cal_fname, cross_talk = ctc_fname, head_pos=None)<br><br><br></div>I am wondering what I am doing wrong, or if I can read head position from the .fif file.<br></div>Any help is welcome,<br><br></div>Best,<br></div>Benoît MARTIN<br></div>
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