Hi,
I'm a bit confused here - do you want F stats or p values?
If you run surface_fdr then you get the multiple-comparison-thresholded
F statistics as well as uncorrected p-values. You can certainly show
the F statistics from this very easily. Is that what you want?
All the best,
Mark
On 4 Nov 2009, at 21:44, Buyean Lee wrote:
> Hi Mark,
>
> I understand that by running 'surface_fdr', one can convert F > statistics to p-values.
> But, in a recent paper (
Zarei et al., NeuroImage 2009, Combining > shape and connectivity ...), I saw a case describing p-values for > the corresponding F statistics (in Figure 1 legend) and presenting F-> statistic maps.
>
> I might be too picky, but I prefer presenting a F-statistic map > because it seems easier to display high F-values (smaller p-values) > in F-statistic maps.
>
> Is there any way to calculate p-values for the corresponding F > statistics?
>
> Thank you,
>
> Buyean
>
>
> -----Original Message-----
> From: Mark Jenkinson <
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> To:
[log in to unmask]
> Sent: Thu, Sep 3, 2009 2:42 pm
> Subject: Re: [FSL] FIRST: critical F value
>
> Hi,
>
> Just run surface_fdr - it will give you uncorrected p-values which > you can
> easily display and threshold plus FDR-corrected F-stats which are > thresholded.
> See
http://www.fmrib.ox.ac.uk/fsl/first/index.html for more info.
>
> All the best,
> Mark
>
> On 3 Sep 2009, at 19:38, Buyean Lee wrote:
>
> > Dear FSL FIRST users,
> >
> > I am trying to display the results of vertex analysis with only > > those regions with F values that are significant (for now > > uncorrected for multiple comparison correction). I think I need to > > put the critical F value in the Salar range of Mesch Options, but I > > don't know how to find this critical F-value.
> >
> > Any suggestion?
> >
> > Thank you,
> >
> > Buyean
> >
> >
