Re: InterpolatingFunctionAnatomy.m
- To: mathgroup at smc.vnet.net
- Subject: [mg57063] Re: InterpolatingFunctionAnatomy.m
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Sat, 14 May 2005 04:58:00 -0400 (EDT)
- Organization: Uni Leipzig
- References: <200505120633.CAA08961@smc.vnet.net> <d614l5$ni0$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, a) I don't think that InterpolatingFunctionAnatomy.m will help you because in a singel time step you will not get a full interpolation otherwise Mathematica would be able to solve dealy differential equations b) *that* is *copyrighted material* ! and only the copyright holder can distribute it Regards Jens "Chrisantha" <ctf20 at sussex.ac.uk> schrieb im Newsbeitrag news:d614l5$ni0$1 at smc.vnet.net... > Dear All, > > Can anyone possible send me the > interpolatingfunctionanatomy .m file. I > have Mathematica 5.0 only. I am running a > simulation of chemical > kinetics, and need the volume to be changed at > each timestep which then > scales the concentrations. This means as far as > I am aware that I will > have to use the EventLocator controller. > > In my system of dif equations I have > > > X'[t] = (bla bla ... ) > V'[t] = (k X[t] ) > > At each timestep I need to scale X[t] by the > ratio of (V[t]/V[t+1]) > because V is the volume of the cell that the > chemical X is in, and X > increases this volume. Therefore, X[t] has to be > reduced by a ratio of > the previous volume to the current volume. I can > only think of doing > this by having an event detect when the volume > increases by a fixed > amount, and catching that event,. and then > rescaling X'[t] and > restaring NDSolve from there. I think the > EventLocator can do this > automatically. Is there a better way to do this? > > Yours ever, > Chrisantha Fernando > > >
- References:
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- From: "David Park" <djmp@earthlink.net>
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