Within-subject coherence statististics for virtual sources

[Jan Mathijs Schoffelen]

Dear Lorina,



My outlook blocked your attached data. I managed to get it anyhow and ran
your script. It runs through just fine. Apparently FT is doing what it
should do.



Yours, JM



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From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf
Of Lorina Naci
Sent: Friday, December 08, 2006 1:01 PM
To: FIELDTRIP at NIC.SURFNET.NL
Subject: Re: [FIELDTRIP] Within-subject coherence statististics for virtual
sources



Dear Jan Mathijs and co,


thanks for following up with my queries. I feel very close to getting my
result barring a few difficulties.

> From the other statfun_xxx functions in the fieldtrip 'private'
> folder, I thought that the statfun_depsamplesT would be more
> appropriate for calculating the t statistic for my two conditions.
> However, when I modify my script by substituting cfg.statistic =
> 'diff' for cfg.statistic = 'depsamplesT' and run it, it crashes.

could you be a bit more specific about why it crashes? Theoretically it
shouldn't crash, but I am not aware of the intricacies of the function.



I have run the script (attached) several times and get slightly different
errors each time. The last error version i get is 'Segmentation violation
occurred within signal handler. Unable to complete stack trace; stack was
probably corrupted.' Any hints as to what this may mean? I've also attached
here my data structures (6 subjects, two conditions (XM, Vis) each), just in
case.



>It might be worthwhile to check whether there is a statfun_paired-tstat in
the release-version, >which should do the same trick.



I did look into the most recent version of Fieldtrip (07.12.2006) and don't
think this function is available.



Many thanks,

Lorina



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