outer.m : a generalized outer function

Does equivalent of X*Y' , replacing "*" with arbitrary func. Strings allowed

This is similar to 29428 or 8370, but more flexible and (I hope) intuitive. Calculate the equivalent of the vector outer product, using any function which acts on two inputs (i.e. two vectors, or one vector and one single value, etc.). Character/string functions are accepted as well as purely numeric functions.