On Thu, Aug 30, 2012 at 6:00 PM, Ondřej Čertík <ondrej.cer...@gmail.com> wrote: > On Thu, Aug 30, 2012 at 4:50 PM, Aaron Meurer <asmeu...@gmail.com> wrote: >> Cramer's method is useful for instructive purposes, and also for >> theory, but practically, it is highly inefficient. The method used by >> SymPy is Gaussian elimination, which is the most direct way to solve a >> system of linear equations. >> >> Of course, if you want to use SymPy to use Cramer's method, that is >> possible. I'm not sure what the best method to get the matrices with >> columns replaced is. Perhaps we should add some method like >> col_replace (and row_replace) to Matrix, which would make this easier. > > SymPy can use Cramer's method to do a matrix inverse, see the > docstring of Matrix.inv(). > > This reminds me that for some reason Matrix class is not exposed in the docs: > > http://docs.sympy.org/dev/modules/matrices.html#sympy.matrices.matrices.Matrix > > there is only one line "alias of MutableMatrix". > > Ondrej
Ah, apparently whenever Matrix was renamed to MutableMatrix, no one updated the docs. I'll put a commit fixing this in PR 1507 (the release PR). Aaron Meurer -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
