Hello,
Is it possible to create a mask of a sub-brick that includes both positive and negative activations exceeding an absolute (pos or neg) threshold? I can mask the positive values using:
3dcalc -a 'ANOVA_N24+tlrc[11]' -expr 'step(a-4.76)' -prefix words_vs_fix_00001
I've tried various logical functions listed in the 3dcalc help but am unable to get both positive and negative activations in the same mask (in different colors).
Your help would be greatly appreciated. Thanks in advance.
Brian