On Thursday 25 May 2006 17:44, Fornito, Alexander wrote:
Sorry, got it wrong way around. Either way, when I run mris_anatomical_stats on labels that I have created, I tend to get positive values for mean curvature for labels of both gyral crowns or sulcal fundi. Are the curvature values provided by mris_anatomical_stats unsigned?
'mris_curvature_stats' provides signed statistics on Gaussian and Mean curvatures. By default it does not calculate the principle curvatures, so it has to be explicitly told:
$>mris_curvature_stats -m -h 11 -G -F smoothwm <SUBJ> <hemi> <curvFile>
where
-m Show the min and max values of each curvature calculation
-h 11 Show a histogram of curvatures sorted into 11 bins
-G Calculate Gaussian statistics
-F smoothwm Use the 'smoothwm' surface for Gaussian statistics (otherwise default to the 'orig' surface which is probably what you don't want).
<SUBJ> The subject to process
<hemi> Hemisphere to process
<curvFile> Curvature file to process (does not affect the Gaussian / mean stats).
Cheers -=R