Re: Range Kutta 4 with variable steps
- To: mathgroup at smc.vnet.net
- Subject: [mg14335] Re: [mg14325] Range Kutta 4 with variable steps
- From: "Jens-Peer Kuska" <kuska at linmpi.mpg.de>
- Date: Thu, 15 Oct 1998 00:28:41 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Hi Vincent, You don't need to write Your own RK-Method. Look at the NDSolve[] function. It has an option Method that You can set it to RungeKutta and You have a variable stepsize method. Hope that helps Jens -----Original Message----- From: Vincent DELAYE <vincent.delaye at wanadoo.fr> To: mathgroup at smc.vnet.net Subject: [mg14335] [mg14325] Range Kutta 4 with variable steps >Hi, > >I'm looking for a numerical method to solve non linear lasers equations >systems : >x'[t]=3D=3D(y[t]-z[t]-1)*x[t] >y'[t]=3D=3Db-x[t]*y[t] >z'[t]=3D=3D-x[t]*z[t] >Range Kutta 4 method is provided by Mathematica, but with constant >steps. Do you know how can I write Range Kutta 4 with variable steps >with Mathematica ? > >Vincent DELAYE vincent.delaye at cea.fr Lti DSYS SCSI >Grenoble (FRANCE) > > >