Programming challenges: processing vectors and matrices

[John Keith]

This simple program will reverse a vector and it is at least as fast as AXL REVLIST AXL. It does not change a type 3 or 4 array to a type 29 array as AXL does. It will work on any RPL calculator.

To reverse the elements of a matrix, one would need to change the 1 GET in line 2 to OBJ\-> DROP *. Changing 1 GET to 1 + \PILIST would allow the program to work with either vectors or matrices but would restrict it to the 48G or newer.

Code:


\<< OBJ\-> \-> d
  \<< 2. d 1. GET
    FOR k k ROLL
    NEXT d \->ARRY
  \>>
\>>