A.16. Augmenting Two or More Matrices

Several matrices can be lined up one after the other or one atop the other or in both directions to obtain a single matrix of larger size. Of course in such augmentations, one needs to be careful about the respective orders of various matrices.

In SAS the operator || (two vertical lines) will arrange matrices side by side and the operator // (two division signs) will do so in the order of one below the other. For example, for the matrices C and D defined above, SIDE_CD = C||D results in the matrix SIDE_CD equal to

and BLO_CTDT = C`// D` results in the matrix BLO_CTDT as