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Re: Table Format Problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98399] Re: Table Format Problem
  • From: dh <dh at metrohm.com>
  • Date: Thu, 9 Apr 2009 05:52:01 -0400 (EDT)
  • References: <grhp6r$mh1$1@smc.vnet.net>


Hi,

to format your data, try the following:



tab = Table[

    Flatten@Table[{R1[t], P1[t]} /. sol[J], {J, 1, 5, 1}], {t, 100, T, 1}];

TableForm[tab,

  TableHeadings -> {Range[100, T],

    Flatten@Table[{R1[J], P1[J]}, {J, 1, 5}]}]



Daniel



Solver wrote:

> Hello,

> 

> I would like to export the results of an NDSolve simulation but I can

> not seem to figure out how to export my data in the format I want.

> Here is a simplified version of my code. I have two variables: R1 and

> P1. I am solving the system from t = 100 to 110 for values of J = 1 to

> 5. I want my data to be in the following format:

> Each column is a solution to a variable for a given time (time are the

> rows). I would have 10 columns (R1[J=1], P1[J=1],R1[J=2],P1[J=2]...R1

> [J=5],P1[J=5]) and 11 rows (one for each time step). The closest I

> could get was having 2 columns (R1, P1) with the rows being solutions

> for J=1, then J=2, etc.

> Here is my code:

> 

> a1=1;

> d1=.3;

> l1=.15;

> T=110;

> 

> dR1=J-l1*R1[t]-a1*R1[t]*P1[t];

> dP1=a1*R1[t]*P1[t]-d1*P1[t];

> 

> Flatten[Map[({R1[110],(P1[110])}/.#)&,Table[sol[J]=NDSolve[{R1'[t]

> ==dR1,P1'[t]==dP1,R1[0]==1,P1[0]==1},{R1,P1},{t,100,T},MaxSteps-

>> 100000],{J,1,5,1}]],1]//Transpose;

> 

> A=Flatten[Table[Evaluate[({R1[t],P1[t]}/.sol[J]),{J,1,5,1}],{t,100,T,

> 1}],2];

> 

> Export["Data.csv",A];

> 

> I appreciate any help you can provide!

> 

> Cheers,

> Shawn

> 




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