[FieldTrip] downsampling CTF data prior to ft_preprocessing

[Frédéric Roux]

Hi Jim, Hi Eelke,

thanks for the fast response.

My issue is that I would like to use ft_definetrial
to get to my trigger events, hence the reason why
I want to downsample the raw-data before accessing it
with ft.

But technically, I guess I should be able to write up
my own trigger detection code. It's just more convenient
without having to do that extra step.

I thought I'd ask before doing that.

In any case if anyone comes up with an idea how to do the 
downsampling on the raw-data, please let me know.

Best,
Fred



Frédéric Roux

----- Original Message -----
From: "J.D. Herring (Jim)" <j.herring at fcdonders.ru.nl>
To: "FieldTrip discussion list" <fieldtrip at science.ru.nl>
Sent: Thursday, January 16, 2014 1:22:07 PM
Subject: Re: [FieldTrip] downsampling CTF data prior to ft_preprocessing

Hi Fred,

If memory is an issue you could try reading-in the data per channel,
resample, and appending afterwards.

Best,

Jim

-----Original Message-----
From: fieldtrip-bounces at science.ru.nl
[mailto:fieldtrip-bounces at science.ru.nl] On Behalf Of Frédéric Roux
Sent: donderdag 16 januari 2014 13:00
To: FieldTrip discussion list
Subject: [FieldTrip] downsampling CTF data prior to ft_preprocessing

Dear all,

does anyone know of a good method to downsample MEG-data acquired with a
CTF system before reading it into Matlab/fieldtrip.

I remember that there is a command-line tool provided by CTF which can do
preprocessing, but I don't remember exactly if it does the job.

Or does anyone know of a good alternative solution?

Best,
Fred

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