<div dir="ltr">Dear Fred,<div><br></div><div>The CTF command line tool is called newDs . There is a configuration file that you should set-up to specify that you want it to downsample. I used it a long time ago but I can try to find out more details if you can't figure it out yourself. The documentation for the function should be in CTF PDF files.</div>
<div><br></div><div>Best,</div><div><br></div><div>Vladimir</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jan 16, 2014 at 12:30 PM, Frédéric Roux <span dir="ltr"><<a href="mailto:f.roux@bcbl.eu" target="_blank">f.roux@bcbl.eu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Jim, Hi Eelke,<br>
<br>
thanks for the fast response.<br>
<br>
My issue is that I would like to use ft_definetrial<br>
to get to my trigger events, hence the reason why<br>
I want to downsample the raw-data before accessing it<br>
with ft.<br>
<br>
But technically, I guess I should be able to write up<br>
my own trigger detection code. It's just more convenient<br>
without having to do that extra step.<br>
<br>
I thought I'd ask before doing that.<br>
<br>
In any case if anyone comes up with an idea how to do the<br>
downsampling on the raw-data, please let me know.<br>
<br>
Best,<br>
Fred<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
Frédéric Roux<br>
</font></span><div class="im HOEnZb"><br>
----- Original Message -----<br>
From: "J.D. Herring (Jim)" <<a href="mailto:j.herring@fcdonders.ru.nl">j.herring@fcdonders.ru.nl</a>><br>
To: "FieldTrip discussion list" <<a href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a>><br>
Sent: Thursday, January 16, 2014 1:22:07 PM<br>
Subject: Re: [FieldTrip] downsampling CTF data prior to ft_preprocessing<br>
<br>
Hi Fred,<br>
<br>
</div><div class="im HOEnZb">If memory is an issue you could try reading-in the data per channel,<br>
resample, and appending afterwards.<br>
<br>
Best,<br>
<br>
Jim<br>
<br>
</div><div class="im HOEnZb">-----Original Message-----<br>
From: <a href="mailto:fieldtrip-bounces@science.ru.nl">fieldtrip-bounces@science.ru.nl</a><br>
[mailto:<a href="mailto:fieldtrip-bounces@science.ru.nl">fieldtrip-bounces@science.ru.nl</a>] On Behalf Of Frédéric Roux<br>
Sent: donderdag 16 januari 2014 13:00<br>
To: FieldTrip discussion list<br>
</div><div class="HOEnZb"><div class="h5">Subject: [FieldTrip] downsampling CTF data prior to ft_preprocessing<br>
<br>
Dear all,<br>
<br>
does anyone know of a good method to downsample MEG-data acquired with a<br>
CTF system before reading it into Matlab/fieldtrip.<br>
<br>
I remember that there is a command-line tool provided by CTF which can do<br>
preprocessing, but I don't remember exactly if it does the job.<br>
<br>
Or does anyone know of a good alternative solution?<br>
<br>
Best,<br>
Fred<br>
<br>
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