First steps with FIELDTRIP

[Nathan Weisz]

dear nicola,

i'm not sure what tutorial you are refering too. take a look here:
http://neuroimaging.ruhosting.nl/fieldtrip/doku.php?id=fieldtrip:documentation:tutorial

read_data already is a low-level function that you should not have to
deal with as enduser.
the first step is to tell fieldtrip when your relevant events occured
(definetrial) and then to apply some preprocessing options
(preprocessing.m).

from there on it all depends on what you want to find out and actually
the nice examples in the tutorial should get you going (i.e. sending
you scripts wouldn't help you more).
in the intro there is a useful overview of the major functions and how
they relate.

Good luck & don't give up!

nathan

On 11.02.2009, at 20:43, Nicola Neumann wrote:

> Dear all,
>
> Just starting to work with FIELDTRIP, I have the typical problems of
> a beginner and wondered whether you could help me with these. I
> conducted an MEG study (CTF, Vancouver whole-head system) in an old-
> new recognition paradigm.
>
> 1. From the tutorial it was not clear to me what the very first step
> is to analyze the data, and I tried the 'read_data' command (dat =
> read_data ('filename.ds');). However, there is an error message
> Error in ==> /Applications/fieldtrip/fieldtrip-20090128/external/ctf/
> getCTFdata.p>getCTFdata at 28
> Error in ==> read_data at 654
>     dat = getCTFdata(hdr.orig, [begtrial:endtrial], chanindx, 'T',
> 'double');
>
> both for my own and your tutorial data. Do you have any idea, why
> the command does not work?
>
> 2. Could you maybe provide me with a skript 'from the very
> beginning" to avoid this kind of problems? I do not know either how
> the header information can be integrated (presumably with
> "read_header"), and how to go on to the next step of preprocessing.
>
> Thank you very much for your help.
> Nicola
>
> ----------------------------------
> The aim of this list is to facilitate the discussion between users
> of the FieldTrip  toolbox, to share experiences and to discuss new
> ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html
>  and http://www.ru.nl/fcdonders/fieldtrip.


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The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.
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