<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Thank you, Cris.<br>
<div class="moz-cite-prefix"><br>
</div>
<blockquote
cite="mid:CADW7XCAdS=fk_JQLqwQKxa9_bS+FoNpOOE5tcmAJKWM98gfcWg@mail.gmail.com"
type="cite">
<div dir="ltr">What I noticed (but I fear I can't be more precise
due to lack of information) is that you use two cfg definitions
(cfg and cfgn) and that might create problems.</div>
</blockquote>
One of them (cfgn) is only being used to define neighbours, so I
don't think that matters.<br>
<blockquote
cite="mid:CADW7XCAdS=fk_JQLqwQKxa9_bS+FoNpOOE5tcmAJKWM98gfcWg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>On top of that I would always clean the actual cfg by
nulling it at the beginning of every function call (cfg=[]).</div>
</div>
</blockquote>
I always do this, only didn't paste that part of my code to have it
occupying less space. So that isn't the problem either.<br>
<blockquote
cite="mid:CADW7XCAdS=fk_JQLqwQKxa9_bS+FoNpOOE5tcmAJKWM98gfcWg@mail.gmail.com"
type="cite">
<div dir="ltr">It would also help a lot if you included the call
to ft_freqanalysis (again with an eye of regard of nulling the
cfg beforehand).</div>
</blockquote>
I doubt it's the cfg in ft_freqanalysis that is causing the problem
- it's the same cfg I've been using for 5 years now, and in line
with the one shown in the tutorial. So unfortunately, not the
solution either.<br>
<br>
The key is in the computation of the scd depending on the method.
The error only occurs with 'hjorth' and 'finite', but not with
'spline'. Maybe I should just read more on these three methods
before I try to advance any further.<br>
<br>
Thanks anyways, Vitoria<br>
<br>
<br>
<br>
<br>
<blockquote
cite="mid:CADW7XCAdS=fk_JQLqwQKxa9_bS+FoNpOOE5tcmAJKWM98gfcWg@mail.gmail.com"
type="cite">
<div class="gmail_extra">On Mon, Mar 9, 2015 at 4:58 AM, Vitória
Piai <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:v.piai.research@gmail.com" target="_blank">v.piai.research@gmail.com</a>></span>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I'm interested in using Laplacian transformation prior to
computing TFRs.<br>
I still haven't read anything about the three methods
implemented in FieldTrip, I must confess, but I think my
question is independent of that. I'm using FT version:
fieldtrip-20140801 on Matlab2014a.<br>
<br>
If I use the method 'spline', I can subsequently run
ft_freqanalysis (or ft_timelockanalysis for that matter).
However, with either 'hjorth' or 'finite', I get an error
when running ft_freqanalysis/ft_timelockanalysis:<br>
My cfg:<br>
<br>
cfgn.method = 'template';<br>
cfgn.layout = 'biosemi64.lay';<br>
cfg.neighbours = ft_prepare_neighbours(cfgn, dat);<br>
<br>
cfg.method = 'hjorth'; %'finite', 'spline'<br>
cfg.elec = ft_read_sens('standard_1005.elc');<br>
lpc = ft_scalpcurrentdensity(cfg, dat);<br>
% Then after that, a commonly used cfg for ft_freqanalysis<br>
<br>
Error using ft_datatype_sens (line 375)<br>
inconsistent number of channels in sensor description<br>
<br>
Error in ft_datatype_raw (line 138)<br>
data.elec = ft_datatype_sens(data.elec);<br>
<br>
Error in ft_checkdata (line 219)<br>
data = ft_datatype_raw(data, 'hassampleinfo',
hassampleinfo);<br>
<br>
Error in ft_freqanalysis (line 211)<br>
data = ft_checkdata(data, 'datatype', {'raw', 'raw+comp',
'mvar'}, 'feedback', cfg.feedback, 'hassampleinfo', 'yes');<br>
<br>
I understand that the "inconsistent number of channels in
sensor description" is coming from these two other
implementations, but should that be the case? The help on
ft_scalpcurrentdensity says " The output data has the same
format as the input and can be used in combination with most
other FieldTrip functions". So I'm wondering whether there's
something special intrinsic to these implementations, I'm
using a too old FT version, my config isn't right, or this
is an issue that has gone unnoticed because those
implementations are not used often.<br>
<br>
Thanks a lot!<br>
Cheers from Berkeley,<br>
Vitoria<br>
<br>
<br>
<br>
_______________________________________________<br>
fieldtrip mailing list<br>
<a moz-do-not-send="true"
href="mailto:fieldtrip@donders.ru.nl" target="_blank">fieldtrip@donders.ru.nl</a><br>
<a moz-do-not-send="true"
href="http://mailman.science.ru.nl/mailman/listinfo/fieldtrip"
target="_blank">http://mailman.science.ru.nl/mailman/listinfo/fieldtrip</a><br>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
fieldtrip mailing list
<a class="moz-txt-link-abbreviated" href="mailto:fieldtrip@donders.ru.nl">fieldtrip@donders.ru.nl</a>
<a class="moz-txt-link-freetext" href="http://mailman.science.ru.nl/mailman/listinfo/fieldtrip">http://mailman.science.ru.nl/mailman/listinfo/fieldtrip</a></pre>
</blockquote>
<br>
</body>
</html>