50g

Hi

i want to know, if it is possible to 'join' matrices on hp50g

by "join" i mean, if you have two matrices [A] and [B].. is it possible
to join them into [A B] (into one bigger matrix that contains both of
them, one next to the other (or maybe even one above the other).

The function AUGMENT (RS MATRICES CREAT AUGMENTED)  can help you, but 
if you have [A] and [B]
it gives you:
[A]
[B]
to get [AB] you need a little program to transpose the two matrices 
then use AUGMENTED and transpose back.

Another way is to use COL+ ( RS MATRICES CREATE COL+)
Example: if you have two matrices A {3 2} in level 2 and B {3 4} in 
level 1 then you want B to be added as a third column in A matrix, so 
enter 3 and then COL+

A little program to get [AB]using COL+ is:

<<
      OVER          @ get a copy of matrix in level 2 @
      SIZE          @ get the size of that matrix @
      2 GET 1 +     @ get the number of columns and add 1 @
      COL+          @ Add the two matrices @
>>