Hi Doug,
thank you very much!
I have two follow-up questions for your two suggestions:
1) If I want to use mri_glmfit-sim but my conjunctions are not from
contrasts that are all from the same GLM, I guess I can still do what you
suggested but I will have to come up with a fwhm.dat for the conjunction,
correct?
Is there a way to compute this from the conjunction sig map, or should I
use the average or the max or the min of the contrasts that go into the
conjunction? This is for functional data.

2) It seems that there is a version of mri_mcsim that allows one to specify
a range of FWHM with the flag --fwhm-max; however, version 1.17 that comes
with the 5.1 and 5.3 releases does bot have that option. Is the version of
mri_mcsim that understands --fwhm-max available?

Thanks again, Caspar



2013/10/24 Douglas N Greve <gr...@nmr.mgh.harvard.edu>

>
> Hi Caspar, there are a couple of things you can do:
>
> 1. Go into the mri_glmfit folder used to create the input contrasts to
> the conjunction. Create a subfolder. Save the conjunction as sig.mgz and
> create a file called "C.dat" (it can be empty) in this folder. Then run
> mri_glmfit-sim specifying to do the simulation rather than using cached
> data.
>
> 2. Create cached data by running mri_mcsim. This may take longer than
> #1, but once you have the cached data you do not need to run it again,
> which could be useful if you are going to do more analyses with this
> template
>
> doug
>
>
> On 10/23/2013 02:55 PM, Caspar M. Schwiedrzik wrote:
> > Hi,
> > I have a question regarding cluster size thresholding using
> > mri_glmfit-sim. Namely, I have a sig.nii conjunction map that I made
> > with mri_concat.
> > The analyses that serve as input to the conjunction map are done on a
> > custom surface template.
> > If I want to run mri_glmfit-sim, how would that work? I obviously do
> > not have precached data.
> > Thanks, Caspar
> >
> >
> >
> >
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> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> gr...@nmr.mgh.harvard.edu
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