       Re: Multiple Executions of .nb file part2

• To: mathgroup at smc.vnet.net
• Subject: [mg90518] Re: Multiple Executions of .nb file part2
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Fri, 11 Jul 2008 02:05:56 -0400 (EDT)
• Organization: Uni Leipzig
• References: <g54op3\$f50\$1@smc.vnet.net>

Hi,

> fun[]:= (SmV;
>
> ***code***
>
> )
>

cant't work but

may be.

Regards
Jens

Dave wrote:
> Hi,
>
> I think I maybe over simplified my situation. My project uses a series of
> nested differential equations. These run over a given time and then print
> either a graph or the plot points or both (depending on my needs).
>
> An example of the code is:
>
> ****************************
>
>
> Off[General::spell]
>
> time = 500;
>
> SmV = -80;
>
>
>
> PD2mnax0[PD2u_] := 1/(1 + Exp[-(PD2u + 24.7)/5.29]);
>
> PD2hnax0[PD2u_] := 1/(1 + Exp[(PD2u + 48.9)/5.18]);
>
> PD2mk10x[PD2u_] := 1/(1 + Exp[-(PD2u + 14.2)/11.8]);
>
> PD2taumnax[PD2u_] := 1.32 - 1.26/(1 + Exp[-(PD2u + 120)/25]);
>
> PD2tauhnax[PD2u_] := (0.67/(1 + Exp[-(PD2u + 62.9)/10]))*(1.5 + 1/(1 + Exp[(
>
> PD2u + 34.9)/3.6]));
>
> PD2taumk1[PD2u_] := 7.2 - 6.4/(1 + Exp[-(PD2u + 28.3)/19.2]);
>
>
>
>
>
> solution = NDSolve[{
>
>
> PD2mnax'[t] == (PD2mnax0[PD2z[t]] - PD2mnax[t])*(1/
>
> PD2taumnax[PD2z[t]]), PD2mnax == PD2mnax0[-80]*(1/
>
> PD2taumnax[-80]), PD2hnax'[t] == (PD2hnax0[PD2z[t]] - PD2hnax[
>
> t])*(1/PD2tauhnax[PD2z[
>
> t]]), PD2hnax[
>
> 0] == PD2hnax0[-80]*(1/PD2tauhnax[-80]),
>
> PD2mkx'[t] == (PD2mk10x[PD2z[t]] - \
>
> PD2mkx[t])*(1/PD2taumk1[PD2z[t]]),
>
> PD2mkx == PD2mk10x[-80]*(1/PD2taumk1[-80]), PD2z'[t] == (-1*(0
>
> + 1*1100*(PD2mnax[t]^3)*PD2hnax[t]*(PD2z[t] - 50)
>
> + 1*150*(PD2mkx[t]^4)*(PD2z[t] + 80)
>
> + 1*0.00081*(PD2z[t] + 50)
>
> )
>
> *(1/6)),
>
> PD2z == SmV
>
>
> },
>
>
>
>
> {PD2z, PD2mnax,
>
> PD2hnax, PD2mkx}, {t, 0, time}, Method -> Automatic, MaxSteps -> \
>
> Infinity];
>
>
>
> ParametricPlot[Evaluate[{t, PD2z[
>
> t]} /. solution], {t, 0, time},
>
> PlotPoints -> time, PlotRange -> {-80, 50}, PlotLabel -> "PD Axon"];
>
> (*
>
> mkw = Table[0, {time-1}];
>
> For[w=1,w<(time),mkw[[w]]=PD2z[w]/.solution;w++];
>
> mkw
>
> *)
>
>
>
> *******************************
>
>
>
>
>
> This produces what looks like a flat line on a graph.
>
> I need to run this file several times changing the variable SmV. Can I
> encapsulate the whole thing in a function? I have tried but it doesn't work.
>
>
> fun[]:= (SmV;
>
> ***code***
>
> )
>
> fun[-80]
>
> out- fun[-80]
>
>
>
> Thank you
>
> David Fourie
>
>
>
>
>
>
>

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