I have a set of, say 36 observations and wish to calculate the distance matrix for these observations.  Now I can do so with the use of a double do-loop, but this seems tedious (even though, for my purposes at this stage, computation time is negligible still).  I read that the "distance" operator can be used in this way: delta = distance(matrix, "L2");  for, say, the Euclidian distance.  It seems like a nifty function, unfortunately on my SAS9.3 system, the log gives me an error saying "Invocation of unresolved module DISTANCE." Anybody have an idea why this is?  ... View more