topic Re: Testing if a matrix is null in v9.3 in SAS/IML Software and Matrix Computations

Testing if a matrix is null in v9.3

xtc283x — Sat, 24 Oct 2015 15:12:02 GMT

I've read that for SAS v12.1, there is a new null matrix operator, {}. The challenge is that I am running SAS v9.3M1. So, in this earlier version, is there a way to test whether or not a matrix is null in v9.3M1?

Re: Testing if a matrix is null in v9.3

Rick_SAS — Sat, 24 Oct 2015 23:15:43 GMT

This article provides several ways to test for empty matrices in 9.3: "How to create and detect an empty matrix"

My favorite is

if type(X) = 'U' then...