No patch but I can tell you were there is something obviously wrong. The matrix H on line 1056 in matrix_integer_dense.pyx should be the empty matrix (perhaps []?) but it is something like ['','']. The computation for adding the missing zero rows goes wrong after that.
Michel On Jun 1, 9:34 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > On 6/1/07, Thea Gegenberg <[EMAIL PROTECTED]> wrote: > > > The method echelon_form gives me an error when I try to take the > > echelon form of a zero matrix. It says "TypeError: entries has the > > wrong length" > > Here's an example to illustrate the bug. I hope somebody will > fix it and send me a patch :-). > > sage: m = matrix(ZZ,3,3,[0]*9) > sage: m.ech > m.echelon_form m.echelonize > sage: m.echelon() > --------------------------------------------------------------------------- > <type 'exceptions.AttributeError'> Traceback (most recent call last) > > /home/was/talks/2007-06-01-grants/<ipython console> in <module>() > > <type 'exceptions.AttributeError'>: > 'sage.matrix.matrix_integer_dense.Matrix_integer_de' object has no > attribute 'echelon' > sage: m.echelon_form() > --------------------------------------------------------------------------- > <type 'exceptions.TypeError'> --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---
