Dear Doug I’ve tried runnig the command:

mri_glmfit-sim --glmdir lh.fsgd_subj_gauss001 --sim mc-z 625 2.3013
mc-z.pos.3 --sim-sign pos

And the following error appears:
"ERROR: desig matrix is not orthogonal, cannot be used with permutation."

As I’ve search in the forum list, I have found that the --sim perm
option does not work with continuous variables, but that --sim mc-z
does, which are the differences between this two methods?

Bests,
Rafa.


2011/1/26 Douglas N Greve <gr...@nmr.mgh.harvard.edu>:
> For the permutation sim, the fwhm should be set to 0. Why are you not using
> mri_glmfit-sim? I would strongly recommend it as that will make sure that
> all the arguments are correct.
>
> doug
>
> Rafa x wrote:
>>
>> Dear Freesurfers,
>> In Freesurfer v5.0 when I try to run the command:
>>
>> mri_glmfit --surf CNTRL_MCI_RAFA_average lh --C contrast.mat --fsgd
>> fsgd.txt dods --mask lh.fsgd_subj/mask.mgh --y
>> CNTRL_MCI_RAFA_stats/lh.fsgd_subj.mgh --sim perm 625 2.301 csd1
>> --sim-sign pos --seed 6555731749
>>
>> I always get the following error:
>>
>> ERROR: you must supply --fwhm with --sim, even if it is 0
>>
>> Is there a bug in the mri_glmfit function?
>>
>> Thank you all in advance,
>> Rafael.
>> _______________________________________________
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>>
>>
>>
>
> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> gr...@nmr.mgh.harvard.edu
> Phone Number: 617-724-2358 Fax: 617-726-7422
>
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