On Thu, 31 Mar 2016 02:23 am, Poul Riis wrote:
> What I intend to do is to let sympy find the derivative of some
> welldefined function and next define the foundation derivative as a normal
> function so that I can calculate numerical values or even make a graph.
I'm glad you explained what you *actually* wanted, because I was going to
guess that you wanted to evaluate the derivative at x = 3:
py> ftext.evalf(subs={x:3})
-0.0600000000000000
--
Steven
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