That's exactly what I needed. Thanks! On Tue, Jan 27, 2015 at 7:14 PM, Aaron Meurer <[email protected]> wrote:
> Use expression.doit(). simplify() ought to be doing this as well ( > https://github.com/sympy/sympy/pull/2936 and > https://github.com/sympy/sympy/issues/6399). > > Aaron Meurer > > On Mon, Jan 26, 2015 at 10:58 PM, almog yalin <[email protected]> > wrote: > >> I'm trying apply the following substitution a(x) = c * b(x) into a'(x) >> >> a = sympy.Function('a') >> b = sympy.Function('b') >> c = sympy.Symbol('c') >> x = sympy.Symbol('x') >> expression = sympy.Derivative(a(x),x) >> expression = expression.subs(a(x),c*b(x)) >> print expression.simplify() >> >> I was expecting to get >> >>> c*Derivative(b(x), x) >>> >>> but got instead >> >>> Derivative(c*b(x), x) >>> >>> Is there a way to move the coefficient c out of the derivative? >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/sympy. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/66c991ad-fc06-42f3-b46b-d096826df457%40googlegroups.com >> <https://groups.google.com/d/msgid/sympy/66c991ad-fc06-42f3-b46b-d096826df457%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to a topic in the > Google Groups "sympy" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sympy/Foi0UaBCmO0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BN%2BU5DS19LSf4bLWORL%2B_T7LnsHeK5BF_OwSM1JnE_Eg%40mail.gmail.com > <https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BN%2BU5DS19LSf4bLWORL%2B_T7LnsHeK5BF_OwSM1JnE_Eg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CA%2BW9CcuPrAc4Q9xSyx8k4Lnv%2Ba%2BuO3%3DkHPVnTmyFE2DDfQt_ng%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
