The SAS/IML language provides two functions for solving a nonsingular nxn linear system A*x = c: The INV function numerically computes the inverse matrix, A-1. You can use this to solve for x: Ainv = inv(A); x = Ainv*c;. The SOLVE function numerically computes the particular solution, x, for a
In the SAS/IML language, the index creation operator (:) is used to construct a sequence of integer values. For example, the expression 1:7 creates a row vector with seven elements: 1, 2, ..., 7. It is important to know the precedence of matrix operators. When I was in grade school,
I bet that many of you reading our blog are familiar with accomplished SAS users and authors Lauren Haworth, Cynthia Zender, and Michele Burlew. Together, they form a powerful triumvirate of SAS experience. If you get a chance to pick up their book Output Delivery System: The Basics and Beyond
