MS Excel has a very intuitive and easy to use formula editor, where you can click on any cell in the table and give it a value of "=" + function. Thus, it is very easy to calculate for instance MEAN or STDEV of a selection of columns (i.e., A1:A10) or rows (i.e., A1:J1).
Would something like that be possible to implement in JMP? Or maybe it is already possible, but I don't know about.