http://en.wikipedia.org/wiki/Matrix_(mathematics) ?
> On 15 Feb 2015, at 11:13, stepharo <steph...@free.fr> wrote: > > Hi > > > I'm wondering why > > | matrix23 | > matrix23 := Matrix rows: 3 columns: 2. > matrix23 at: 1 at: 1 put: 11. > matrix23 at: 1 at: 2 put: 12. > matrix23 at: 1 at: 3 put: 13. > matrix23 at: 2 at: 1 put: 21. > matrix23 at: 2 at: 2 put: 22. > matrix23 at: 2 at: 3 put: 23. > > is not equivalent to > > | matrix23 | > matrix23 := Matrix rows: 3 columns: 2. > matrix23 atColumn: 1 atRow: 1 put: 11. > matrix23 atColumn: 1 atRow: 2 put: 12. > matrix23 atColumn: 1 atRow: 3 put: 13. > matrix23 atColumn: 2 atRow: 1 put: 21. > matrix23 atColumn: 2 atRow: 2 put: 22. > ^ matrix23 atColumn: 2 atRow: 3 put: 23 > > I always thought that math notation was x,y (row,colum) > How is it done in other languages? > I checked the implementation so I know but why this choice in the API. > >
