From: ts Date: 2005-11-28T23:00:46+09:00 Subject: Re: 2dim array/matrix >>>>> "R" == Robert Klemme writes: R> m[1,1] = 123 Try it :-) moulon% ruby -rmatrix -e 'm = Matrix[[25, 93], [-1, 66]]; m[1, 1] = 123' -e:1: undefined method `[]=' for Matrix[[25, 93], [-1, 66]]:Matrix (NoMethodError) moulon% Guy Decoux