If I understand you correctly, it is related to this: http://code.google.com/p/sympy/issues/detail?id=16
Symbols with indices is something that would be nice to have implemented, but unfortunately isn't yet. So maybe the information on that page will help you. Aaron Meurer On Jan 27, 2010, at 3:44 PM, Nikolas Tezak wrote: > Hi, > > I am wondering if it were in principle possible to create subclass of Symbol, > that could handle array indices, so that at a later time (after having > performed symbolic calculations) I could just substitute a numpy array in for > that symbol. > > e.g. (10 + a[:,0] *a[:,1]).subst(a, np.array([[...]]) > Of course I could simply create symbols for individual array elements, but I > am working with a large number of coefficients (~1000+) for which it would > seem inefficient (at least to me) to create individual symbols. > > I am still trying to get a good feeling for the code and I will try to > implement it myself, but maybe some of you already know of some reason why > this would not work (efficiently). > > Nikolas > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > 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/sympy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sympy" group. 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/sympy?hl=en.
