Did you look in the summary file? If you have questions about that, can you send it?
doug

On 06/11/2013 11:34 AM, Glen Lee wrote:

mri_segstats --seg mask.mgh --id 1 --i /fMRI/2D/freesurfer/fsaverage_sym/surf/lh.area --sum sum.dat

On Tue, Jun 11, 2013 at 10:41 AM, Douglas Greve <greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu>> wrote:

    what is your full command line?


    On 6/11/13 10:04 AM, Glen Lee wrote:

    thanks Doug.
    it worked and I got the following result on which I have
    clarifying questions:

    --------------
    Voxel Volume is 1 mm^3
    Generating list of segmentation ids
    Found   1 segmentations
    Computing statistics for each segmentation

      0 1 81837 81837 <tel:1%20%C2%A0%2081837%20%C2%A081837>

    ----------------

    1) I'm assuming that voxel here refers to vertex since I'm
    submitting the surface data.

    2) what does 'found 1 segmentations mean'?

    3) the dimension is 81837mm^2, correct?




    On Tue, Jun 11, 2013 at 12:31 AM, Douglas Greve

    <greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu>> wrote:

        It's --sum for this, not --o
        doug


        On 6/10/13 4:44 PM, Glen Lee wrote:

        Thanks Doug!

        I just tried, but I got an error:
        mri_segstats --seg mask.mgh --id 1 --i
        /fMRI/2D/freesurfer/fsaverage_sym/surf/lh.area --o sum.dat
        ERROR: Option --o unknown

        I don't see --o option when I looked up mri_segstats --help
        either. FYI, I'm using v5.1.
        Any idea?



        On Mon, Jun 10, 2013 at 3:39 PM, Douglas N Greve
        <greve@nmr.mgh.harvard.edu

        <mailto:greve@nmr.mgh.harvard.edu>> wrote:


            Hi Glen, you can use

            mri_segstats --seg mask.mgh --id 1 --i
            $SUBJECTS_DIR/fsaverage_sym/surf/lh.area --o sum.dat

            doug


            On 06/10/2013 03:17 PM, Glen Lee wrote:
            > Dear freesurfer users
            >
            > I'm wondering if there is any way of figuring out the
            surface size
            > within a mask image (mask.mgh)
            > which is generated after running a group-level GLM
            analysis (2nd RFX)
            > using mri_glmfit.
            >
            > As I'm thinking, this may be:
            >   number of vertex by dimension of one vertex (1mm).
            >
            > But I could be wrong and let me know if anyone knows
            the solution.
            >
            > -Glen
            >
            > fyi) the group analysis was performed in freesurfer
            sym space.
            >
            >
            >
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            Douglas N. Greve, Ph.D.
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