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[Talsma D]

Hi Robert,

Thanks for your reply. I guess your suggestion of upgrading fieldtrip
helped a lot. Using pretty much the same preprocessing script as I used
yesterday, it looks like I'm getting through CTF_READ_RES4 twice, but
then the script bombs with a message that the function
private\read_ctf_res4.p is inaccessible. Could this be something in my
setup?

I've tried version 0.9.6 as well as the latest snapshot, both giving the
same results. 

Cheers,
Durk

CTF_READ_RES4 [v  1.15]
...done (  0.85 sec)


CTF_READ_RES4 [v  1.15]
...done (  0.72 sec)

??? Previously accessible file
"C:\MATLAB704\toolbox\shared\fieldtrip\private\read_ctf_res4.p" is now
inaccessible.

Error in ==> fieldtrip\private\read_ctf_trigger at 56
hdr = read_ctf_res4(headerfile);

Error in ==> definetrial at 411
  triggerChan = read_ctf_trigger(cfg.dataset);

Error in ==> preprocessing at 250
[cfg] = definetrial(cfg);

Error in ==> tfanalysis at 12
dataFIC = preprocessing(cfg);

-----Oorspronkelijk bericht-----
Van: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] Namens
Robert Oostenveld
Verzonden: woensdag 18 mei 2005 18:40
Aan: FIELDTRIP at NIC.SURFNET.NL
Onderwerp: Re: [FIELDTRIP]


Hi Durk,

The VUMC MEG system is known to generate a CTF file format that is 
slightly different from the format that we have in Nijmegen. However, I 
have succesfully read in data from Amsterdam using Darren's functions, 
so that should work, except that the sensor position information that 
originates from Darrens function is not trasferred into Fieldtrip. It 
would not be difficult to implement that as well, but it is only needed 
if you want to do source analysis (or MEG realignment).

But I also I notice that your Matlab error log refers to some 
closed-source p-files which are open source by now. Please download the 
latest version of fieldtrip, maybe that already solves part of your 
problem. See ftp://m50-336.azn.nl/pub/fieldtrip and fetch version 0.9.6 
or the latest daily release.

Robert

On 18 May 2005, at 15:49, Talsma D wrote:

> Hi Everybody,
>
> I'm trying to read a ctf, which was collected at the VUMC MEG center 
> in Amsterdam, using fieldtrip. I've tried tried reading the data with 
> as well as without Darren Weber's ctf code. Anyways, I'm following the

> fieldtrip example code pretty closely (see below) and both attempts 
> have resulted in the error messages attached below stating that a 
> function or
> variable named coil2_pos is missing.

----------------------------------------------------------------------
Robert Oostenveld, PhD
F.C. Donders Centre for Cognitive Neuroimaging
Radboud University Nijmegen
phone: +31-24-3619695
http://www.ru.nl/fcdonders/
----------------------------------------------------------------------
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