On Wed, 21 Mar 2001, rashworth wrote: > Could you define for me a 3 by 3 matrix? > What is the web reference for NArray? require 'narray' matrix = NArray.object(3,3) to get to NArray's website you go to RAA http://www.ruby-lang.org/en/raa.html and search for "NArray", and within two clicks you're at http://www.ir.isas.ac.jp/~masa/ruby/index-e.html matju