vtwosample_ttest -in1 cgtbsm_group1_*.v -in2 cgtbsm_group2_*.v -out zmap.v
Positive values in the output map indicate that the mean values in
group 1 ('-in1') are larger than mean values in group 2 ('-in2'). In
line with the LIPSIA convention when determining contrasts, negative
values indicate that mean group 1 < mean group 2.
Caution: The program 'vtwosample_ttest' should only be used on registered data, i.e. on data that are geometrically aligned and normalized.