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Hi,<br>
<br>
I might be mistaken since I am not using a neuromag system, but as
far as I know a Neuromag system already has planar gradiometers? If
so, then there would be no need to apply ft_megplanar (and actually,
it would be an meaningless operation)<br>
<br>
Best,<br>
Jörn<br>
<br>
On 2/23/2012 10:11 AM, jan-mathijs schoffelen wrote:
<blockquote
cite="mid:A2883A8D-A92F-4924-BF36-EBEB0F857BC2@donders.ru.nl"
type="cite"><br>
<div><br>
<div>Begin forwarded message:</div>
<blockquote type="cite"><font class="Apple-style-span"
color="#000000"><br>
</font>
<div class="gmail_quote">---------- Forwarded message
----------<br>
From: <b class="gmail_sendername">Ion Lavado</b> <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:lavado@gmail.com">lavado@gmail.com</a>></span><br>
Date: 2012/2/21<br>
Subject: ft_megplanar problem for planar gradient
calculation<br>
To: <a moz-do-not-send="true"
href="mailto:fieldtrip-request@donders.ru.nl">fieldtrip-request@donders.ru.nl</a><br>
<br>
<br>
Hello, i'm doing the cluster based permutations tests on
time-frequency data tutorial. I'm using an Elekta neuromag
with 306 channels. My problem comes when i try to calculate
the planar gradient. This is what i do:<br>
<br>
%************ READ WORD EVENT ************<br>
cfg = []; <br>
cfg.dataset = '21_muti.fif'; <br>
cfg.trialdef.eventtype = 'STI101';<br>
cfg.trialdef.prestim = 1;<br>
cfg.trialdef.poststim = 1;<br>
cfg.trialdef.eventvalue = 1; <br>
cfg = ft_definetrial(cfg); <br>
cfg.channel = {'MEG'}; <br>
cfg.demean = 'yes';<br>
cfg.baselinewindow = [-0.5 0];<br>
dataMuti21_words = ft_preprocessing(cfg);<br>
%************ READ PICTURES EVENT ************<br>
cfg = []; <br>
cfg.dataset = '21_muti.fif'; <br>
cfg.trialdef.eventtype = 'STI101';<br>
cfg.trialdef.prestim = 1;<br>
cfg.trialdef.poststim = 1;<br>
cfg.trialdef.eventvalue = 6; <br>
cfg = ft_definetrial(cfg); <br>
cfg.channel = {'MEG'}; <br>
cfg.demean = 'yes';<br>
cfg.baselinewindow = [-0.5 0];<br>
dataMuti21_pictures = ft_preprocessing(cfg);<br>
<br>
<br>
<br>
%******* CALCULATE PLANAR GRADIENT ******<br>
cfg = [];<br>
cfg.planarmethod = 'sincos';<br>
cfg_neighb.method = 'distance';<br>
cfg.grad = avg_words.grad;<br>
cfg.neighbours = ft_prepare_neighbours(cfg_neighb,
dataMuti21_pictures);<br>
avg_words_planar = ft_megplanar(cfg, dataMuti21_words);<br>
avg_pictures_planar = ft_megplanar(cfg,
dataMuti21_pictures);<br>
<br>
<br>
HERE IS WHERE I GET THE ERROR: <br>
??? Error using ==> ft_checkdata at 359<br>
This function requires ctf151, ctf275, bti148, bti248,
itab153, yokogawa160 or yokogawa64 data as input, but you
are giving<br>
neuromag306 data.<br>
<br>
Error in ==> ft_megplanar at 107<br>
data = ft_checkdata(data, 'datatype', {'raw' 'freq'},
'feedback', 'yes', 'hassampleinfo', 'yes', 'ismeg', 'yes',
'senstype',<br>
{'ctf151', 'ctf275', 'bti148', 'bti248', 'itab153',
'yokogawa160', 'yokoga <br>
<br>
<br>
Can't i use neuromag306 data type sens for this function?
any solution? THANKS IN ADVANCE<span class="HOEnZb"><font
color="#888888"><br>
<br>
Ion<br>
</font></span></div>
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<br>
<br>
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<br>
<br>
<pre class="moz-signature" cols="72">--
Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
Neuronal Oscillations Group
P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands
Contact:
E-Mail: <a class="moz-txt-link-abbreviated" href="mailto:jm.horschig@donders.ru.nl">jm.horschig@donders.ru.nl</a>
Tel: +31-(0)24-36-68493
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Visiting address:
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NL-6525 EN Nijmegen
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