On Friday, November 8, 2013 10:58:36 PM UTC-6, Aaron Meurer wrote: > > Just use symbols(). var() is only for interactive use. > > Aaron Meurer > > On Nov 8, 2013, at 8:56 PM, Erin Hodgess <[email protected]<javascript:>> > wrote: > > Thank you. > > My ideal would be something like: > > x = var('x') > t = symbols('t') > > y = exp(-x)*exp(t*x) > y > exp((t-1)*x) > > I'm thinking about moment generating functions. > > Thanks! > Erin > > > On Friday, November 8, 2013 9:50:06 PM UTC-6, Aaron Meurer wrote: >> >> Take a read of http://docs.sympy.org/latest/tutorial/gotchas.html#symbols >> (and I recommend the rest of that tutorial as well). You need to >> define t first. Probably you just want to add >> >> t = symbols('t') >> >> somewhere to your script. >> >> Aaron Meurer >> >> >> >> On Fri, Nov 8, 2013 at 6:48 PM, Erin Hodgess <[email protected]> >> wrote: >> > Hello! >> > >> > I would like to use a letter as a constant in >> integration/differentiation >> > problems but I am having some trouble. >> > >> > For instance, I would like to have >> > exp(t*x) >> > >> > But when I do that, I get "t is not defined". >> > >> > This is in Python 2.7.5 >> > >> > Thanks for any help! >> > >> > Sincerely, >> > Erin >> > >> > -- >> > 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. >> > For more options, visit https://groups.google.com/groups/opt_out. >> > -- > 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] <javascript:>. > To post to this group, send email to [email protected] <javascript:>. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. > >
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