Hi thanks for your reply, but I am not sure what exactly do you mean by expand "then to factorize".
I found that if I set the transfer function to be H = k / ( (s+p1) * (s+p2) ), then the inverse laplace transform becomes: k*e^(-p1*t) / (p1-p2) + k*e^(-p2*t) / (p1-p2) *which is what I prefer.* It is weird to me that adding a constant 'k' change the form that Sympy chooses to show the result. On Friday, January 1, 2016 at 2:46:19 AM UTC-5, Christophe Bal wrote: > > Hello. > > Have you triez to expand 1nd then to factorize the formula ? > Le 1 janv. 2016 03:42, "Ken" <[email protected] <javascript:>> a écrit : > >> I've just started learning Sympy. I wrote a few lines of code to perform >> a inverse laplace transform on a simple 2nd order transfunction: >> >> H(s) = 1 / ((s+p1) * (s+p2)). >> >> The result I got from Sympy is >> >> (e^(p1*t) - e^(p2*t))*e^-t*(p1+p2) / (p1 - p2) >> >> Is there a way to simplify this result to the one like in Maxima (e^-t*p1 >> + e^-t*p2) / (p1-p2) ? >> >> -- >> 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 https://groups.google.com/group/sympy. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/0b4a638b-b9d8-426d-99c3-12fdaf1cc973%40googlegroups.com >> >> <https://groups.google.com/d/msgid/sympy/0b4a638b-b9d8-426d-99c3-12fdaf1cc973%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 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 https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/f730ca86-6a64-4224-b039-2b7197fb68c7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
