From: Nils Wagner <nwagner@ia...>  20070428 07:10:52

On Fri, 27 Apr 2007 23:22:04 +0100 darkside <in.the.darkside@...> wrote: > 2007/4/27, John Hunter <jdh2358@...>: >> >> On 4/27/07, darkside <in.the.darkside@...> wrote: >> > hi everyone, >> > I'm trying to solve a lineal differential equation >>system, and I,m >> proving >> > with the mlab.rk4 function. >> > The problem I've found is that if the solution if a >>complex number, I >> can't >> > use this functin, because it doesn't accept complex >>number, and I can >> only >> > get the real case. >> > >> > Have anyone treat with this problem? >> > What do you use to solve differential equation >>systems? >> >> >> rk4 was something I wrote long ago to have a simple ODE >>integrator in >> case scipy wasn't installed on my system. You should be >>using the >> scipy.integrate tools > > > Thank you very much!!! > > I used scipy.integrate tools, splitting complex and real >part of the > equations, and it worked so good!! > > I tried to use: In addition I have filed a ticket for a >complex ODE solver. > http://projects.scipy.org/scipy/scipy/ticket/334 > > But I haven't been able to compile it. It returns a lot >of errors when I > tried. I suposse that it's because of the fortran >compiler, but I don't > know. Please remove the lines in zvdemo beginning with line 121. Rename zvdemo mv zvdemo zvdemo.f 1. g77 c zvdemo.f zvode.f 2. g77 o test zvdemo.o zvode.o 3. ./test > test.out HTH Nils 