On 4/23/07, didier deshommes <[EMAIL PROTECTED]> wrote: > On 4/23/07, David Joyner <[EMAIL PROTECTED]> wrote: > > On 4/23/07, didier deshommes <[EMAIL PROTECTED]> wrote: > > matrix_from_rows_and_columns( ) > > Thanks, I knew there was something I was missing. Any chance of > aliasing this function to "submatrix()"? Because > "matrix_from_rows_and_columns()" feels clunky...
No, because it is not a submatrix in general. For example: sage: a = random_matrix(QQ,3,4); a [-1/2 1 0 0] [ -1 -1 2 2] [-1/2 1/2 -1 0] sage: a.matrix_from_columns([0,0,0,1,3]) [-1/2 -1/2 -1/2 1 0] [ -1 -1 -1 -1 2] [-1/2 -1/2 -1/2 1/2 0] Let me know if this function is too slow of a base ring that you're using -- it can be optimized. William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
