OpenEuphoria

Re: Matrix Algebra

• Posted by Robert Craig <72614.1667 at COMPUSERVE.COM> Dec 08, 1996
• 1952 views

Arthur Adamson writes:
> global type vector(integer len)
>    --type vector(x) creates and initializez ax x element vector to 0
>
>      sequence s
>      s = {0.0}
>
>      for i = 2  to len  by 1 do  s = s & {0}
>      end for
>   return s
> end type

In Euphoria a "type" should return 0 (FALSE) or non-zero (TRUE).
Perhaps you mean "function".

In this code and some similar code that you posted I would rather
see something like:

    repeat(0, x) -- standard Euphoria library routine, repeats 0 x times

rather than a "&" or append() loop. repeat() is simpler, executes faster, and
handles the case of length 0 correctly. (Of course by initializing s
to the empty sequence, {}, and running the for-loop from 1 to n,
the loop method above could also handle length-0 correctly).

You can initialize a "2-dimensional" sequence using:

  z = repeat(repeat(0,x), y)

and so on for 3-d, 4-d etc.

Other than that, I think a matrix algebra package could be quite useful.
I don't know of anyone who is working on one.

Regards,
   Rob Craig
   Rapid Deployment Software