On 5 July 2013 11:14, Ralf Hemmecke <r...@hemmecke.org> wrote: > > Maybe one can also consider something like > > m(3..5, 2..6) > > for selecting rows 3,4,5 and columns 2,3,4,5,6 out of a bigger matrix. > > Or maybe even m(1..n by 2, 1..n). >
+1 > And somehow I have the impression it can be useful to unselect rows and > columns. For example, > > m(-3, -7) > > might mean the whole matrix without row 3 and without column 7. +1 > But that is getting complicated. Jus think of m(3,-2). ;-) OK. 3rd row without the 2nd component. > Maybe it's better to let m(-1,-1) denote the element in the lower right > corner, i.e. index wrapping. > -1 > Another idea is to index by IntegerMod(n) elements. > 0 Thanks. Bill. -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to fricas-devel+unsubscr...@googlegroups.com. To post to this group, send email to fricas-devel@googlegroups.com. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/groups/opt_out.
