afni.nimh.nih.gov

I've done a conjunction analysis to find areas of common activation for three tasks. I've seen from the message board that a good way to estimate the t-values for the peak activations is to use the minimum t-value from the three tasks used in the conjunction. However, 3dcalc will only allow 2 input arguments for -min. Is there another command to calculate the minimum value of 3 arguments?

thank you