Hi,
I decided I should standardize my fMRI data across sessions by rescaling each voxel to have a run-mean of 100. Normalized data looked okay under manual inspection in FreeView. When I tried to analyze this data, however, I consistently get an error partway through:
""" Index exceeds matrix dimensions.
Error in fast_selxavg3 (line 762) acfrun = nrho1segmn(nthseg).^([0:flac.ntp-1]');
ERROR: fast_selxavg3() failed\n a_100_Av_s_task_fmov_bgrnd failed """
Any guess what might be causing this, or how to troubleshoot? Multiple analyses that worked on non-normalized data are mostly (but somehow not universally) failing in this same way.
Thanks much.
stephen
*stephen v. shepherd phd* The Rockefeller University / 1230 York Avenue / New York NY 10065-6307 USA // 212.327.7699