Maybe we should vectorize subs, but in the meanwhile, you can use list comprenehsions, and map if you want to evalf:
In [5]: s = x*pi In [6]: [s.subs(x, i) for i in range(10)] Out[6]: [0, π, 2⋅π, 3⋅π, 4⋅π, 5⋅π, 6⋅π, 7⋅π, 8⋅π, 9⋅π] In [7]: map(N, [s.subs(x, i) for i in range(10)]) Out[7]: [0, 3.14159265358979, 6.28318530717959, 9.42477796076938, 12.5663706143592, 15.707963267949, 18.8495559215388, 21.9911485751286, 25.1327412287183, 28.2743338823081] Also, I think it would be nice to have a subs function that is a wrapper around subs like we do with N and evalf so it is easier to map subs to a list (right now you would have to use a lambda function). Aaron Meurer On Dec 3, 2009, at 6:03 PM, twk wrote: > Hi, > I am relatively new to sympy but like it and try to use it for my > calculations. > > Now, I would like to use symbolic terms for further numeric > calculations. > I tried to use something like .subs(x,range(20)) but it did not work. > Is there a way to treat symbols in a symbolic expression like a list > or matrix? > > Would be great if somebody could help me! > > Thanks, > twk > > -- > > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to sy...@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. > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@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.
