Proc iml 3d array

[berkayoz]

Hi everyone!

I am trying to define a three dimensional array with proc iml. Currently I am converting a matlab code to SAS so that I need to deal with matrices a lot. Is there any known way to define a 3d array /matrix?

[IanWakeling · Accepted solution]

One way is to use a list of ordinary 2d matrices.  For example the code below creates a list of 3 4x4 matrices, then modifies two of them.

proc iml;
  Z = ListCreate(3);
  do i = 1 to 3;
    Z$i = i(4);
  end;
  Z$2 = Z$2 + 1;
  Z$3 = Z$3 # 3;

  package load listutil;
  call listprint(Z);
quit;