I have extracted a tract from the connectome and then used tck sample to generate a mean value along the tract. However the output mean.csv file has 79 values, not one mean value as I expected. The code I used is below;
connectome2tck 200K.tck assignment_200.csv edge_ -nodes 8,366 -exclusive -files per_edge -force
#Calculate average value of tract
tcksample edge_8-188.tck image.nii.gz edge_8_188_mean.csv -stat_tck mean
Am i doing something wrong, where does the 79 values come from?