Hello Freesurfer experts-- I ran mri_glmfit-sim to validate the group level GLM result (which was already done using mri_glmfit), but I was not able to get any result out of it.
Even with a quite liberal threshold (2), no vertices came out (below is what I typed in for the random permutation). mri_glmfit-sim --glmdir GLM --sim perm 100 2 perm.abs.2 --sim-sign abs --overwrite What is strange is that I was clearly see a number of clusters when I overlaid sig.mgh at a matched threshold (e.g., p>2), but no cluster shows up in perm.abs.2.sig.cluster.mgh. I should be able to see the identical map between those right? FYI, I also pasted the content in perm.abs.2.sig.cluster.summary below. As can be seen, nothing is listed in the stats table. Any of your help would be greatly appreciated. -Glen # Cluster Growing Summary (mri_surfcluster) # $Id: mri_surfcluster.c,v 1.51.2.1 2011/03/28 15:32:36 greve Exp $ # $Id: mrisurf.c,v 1.693.2.2 2011/04/27 19:21:05 nicks Exp $ # CreationTime 2013/06/03-20:19:31-GMT # cmdline mri_surfcluster --in GLM/osgm/sig.mgh --csd GLM/csd/perm.abs.2.j001-osgm.csd --mask GLM/mask.mgh --cwsig GLM/osgm/perm.abs.2.sig.cluster.mgh --vwsig GLM/osgm/perm.abs.2.sig.voxel.mgh --sum GLM/osgm/perm.abs.2.sig.cluster.summary --ocn GLM/osgm/perm.abs.2.sig.ocn.mgh --oannot GLM/osgm/perm.abs.2.sig.ocn.annot --annot aparc --csdpdf GLM/osgm/perm.abs.2.pdf.dat --cwpvalthresh .05 --o GLM/osgm/perm.abs.2.sig.masked.mgh --no-fixmni --surf white # cwd /glen/2D/results/LH # sysname Linux # hostname sumo.uphs.upenn.edu # machine x86_64 # FixVertexAreaFlag 1 # FixSurfClusterArea 1 # # Input GLM/osgm/sig.mgh # Frame Number 0 # srcsubj fsaverage_sym # hemi lh # surface white # annot aparc # SUBJECTS_DIR /usr/local/freesurfer5-1/subjects # SearchSpace_mm2 59961.4 # SearchSpace_vtx 82070 # Bonferroni 0 # Minimum Threshold 2 # Maximum Threshold infinity # Threshold Sign abs # AdjustThreshWhenOneTail 1 # CW PValue Threshold: 0.05 # Area Threshold 0 mm^2 # CSD thresh 2.000000 # CSD nreps 100 # CSD simtype perm # CSD contrast osgm # CSD confint 90.000000 # Overall max 3.495 at vertex 61659 # Overall min -4.18843 at vertex 73402 # NClusters 0 # Total Cortical Surface Area 59961.4 (mm^2) # FixMNI = 0 # # ClusterNo Max VtxMax Size(mm^2) MNIX MNIY MNIZ CWP CWPLow CWPHi NVtxs Annot
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