On Jan 13, 2008 7:09 PM, Alan Bromborsky <[EMAIL PROTECTED]> wrote: > > > Ondrej Certik wrote: > > On Jan 13, 2008 5:58 PM, Alan Bromborsky <[EMAIL PROTECTED]> wrote: > > > >> The quickest way for me to get my geometric algebra module working with > >> sympy is to override the +,-, and * operators in numpy so that they work > >> with sypmy objects as array components. However, I have not found any > >> references on how to override operators in exisiting modules. Is there > >> anyway to do this without modifying the code in the numpy module? > >> > > > > Don't know about numpy. But I think the quickest way is to get rid > > of the sequence protocol in sympy, i.e. don't use > > > > sin(x)[:] but sin(x).args[:] > > > > then numpy should start working with sympy like a charm. This is the issue: > > > > http://code.google.com/p/sympy/issues/detail?id=556 > > > > And I submitted my first code yesterday: > > > > http://groups.google.com/group/sympy-patches/browse_thread/thread/bc52b09cea44893d > > > > now the whole sympy needs to be fixed to use .args[:] and that's it. > > > > Ondrej > > > > > > > > > > How would you use this so that if X and Y are numpy arrays stuffed with > sympy expressions and z is a sympy expression so that X+Y, X-Y, and z*X > are correctly evaluated???????
I have a surprise for you: I just created patches for that in the issue: http://code.google.com/p/sympy/issues/detail?id=556 before they get reviewed and pushed into our official repo, you can try it like this: $ hg clone http://hg.certik.cz/sympy-devel/ $ cd sympy-devel/ $ bin/isympy [...] In [1]: from numpy import array In [2]: X = array([x, x**2, sin(x)]) In [3]: Y = array([y**3, 5, log(x)]) In [4]: X Out[4]: array([x, x**2, sin(x)], dtype=object) In [5]: Y Out[5]: array([y**3, 5, log(x)], dtype=object) In [6]: X+Y Out[6]: array([x + y**3, 5 + x**2, log(x) + sin(x)], dtype=object) In [7]: X-Y Out[7]: array([x - y**3, (-5) + x**2, -log(x) + sin(x)], dtype=object) In [8]: z*X Out[8]: array([x*z, z*x**2, z*sin(x)], dtype=object) So, what do you think now? :) Ondrej --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
