HP 48gII - Manual (Page 311)

Page 10-11
If using RPN mode, we assume that the matrix is in the stack and use {6}
` RDM.
Note: Function RDM provides a more direct and efficient way to transform lists
to arrays and vice versa, than that provided at the end of Chapter 9.
Function RANM
Function RANM (RANdom Matrix) will generate a matrix with random integer
elements given a list with the number of rows and columns (i.e., the
dimensions of the matrix). For example, in ALG mode, two different 2
×3
matrices with random elements are produced by using the same command,
namely,
RANM({2,3}) :
In RPN mode, use {2,3}
` RANM.
Obviously, the results you will get in your calculator will most certainly be
different than those shown above. The random numbers generated are
integer numbers uniformly distributed in the range [-10,10], i.e., each one of
those 21 numbers has the same probability of being selected. Function
RANM is useful for generating matrices of any size to illustrate matrix
operations, or the application of matrix functions.
Function SUB
Function SUB extracts a sub-matrix from an existing matrix, provided you
indicate the initial and final position of the sub-matrix. For example, if we