Hello all:
I'm trying to determine a specific p-value for a cluster of voxels in my image (the voxels have been selectively chosen for other reasons) using alphasim in order to compare with p-values I determine using another method. I've taken the cluster out and created a new (smaller) image with only these voxels and all surrounding voxels have been set to r=0 (p=1.)

can Alphasim be used in this way ? it's my understanding that the alphasim program takes cluster sizes and associated p-values for correlations of each of the voxels within range and uses monte-carlo simulations to generate a single probability that reflects the likelihood of finding all of these voxels so close together.
under that assumption I undumped the isolated cluster image and used the following command line:
AlphaSim -nx 7 -ny 8 -nz 9 -dx 1 -dy 1 -dz 1 -rmm 4 undump+orig.BRIK
and I get the error :
AlphaSim Error: unrecognized command line option
so either I'm inputting my options wrong, or I'm not allowed to feed it this input : can anyone tell me what I'm doing wrong ?
thanks for your time:
-B