Hi,
Yes, for a given single contrast the values are all positive with
respect to that contrast (e.g. tstat1). To get the negative contrast
you will need to add a second contrast with negative values, which
will result in (e.g.) tstat2.
Yes, to do custom plotting then matlab is a good place to do that. You
can look at data "timeseries" in all_FA_skeletonised in FSLView, and
extract data timeseries into a text file using fslmeants.
Cheers.
On 7 Nov 2007, at 12:48, Ed Roberts wrote:
> Hi,
>
> I'm trying to correlate behavioural data with FA maps using TBSS and
> randomise.
>
> Firstly, are the correlations I get with max_tstat etc all positive?
> And if
> I want to examine negative correlations do I just change the
> behavioural
> correlates accordingly?
>
> Second, is there an easy way to produce a graph of my correlations,
> e.g. RT
> vs FA? Or should I just import the lot into Matlab and do it manually?
>
> Cheers,
>
> Ed Roberts
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Stephen M. Smith, Professor of Biomedical Engineering
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