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Re: how to export to Excel in Mathematica from a Parametricplot command

  • To: mathgroup at smc.vnet.net
  • Subject: [mg127189] Re: how to export to Excel in Mathematica from a Parametricplot command
  • From: "Alexey Popkov" <lehin.p at gmail.com>
  • Date: Wed, 4 Jul 2012 03:36:23 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jstl0d$k81$1@smc.vnet.net>

<mrafiee20 at gmail.com> wrote: news:jstl0d$k81$1 at smc.vnet.net...
> Hi all,
>
> This example is from Mathematica:
> http://reference.wolfram.com/mathematica/ref/ParametricPlot.html
>
> NDSolve[{y'[t] == y[t] (x[t] - 1), x'[t] == x[t] (2 - y[t]),
>   x[0] == 1, y[0] == 2.7}, {x, y}, {t, 0, 10}];
> ParametricPlot[Evaluate[{x[t], y[t]} /. First[%]], {t, 0, 10}]
>
> My question is:
> How can I export the results (*.xls or *.dat) to plot it with other 
> programs like Origin pro, Excel, Tecplot, etc.?
>
>

Try this:
NDSolve[{y'[t] == y[t] (x[t] - 1), x'[t] == x[t] (2 - y[t]), x[0] == 1,
y[0] == 2.7}, {x, y}, {t, 0, 10}];
f[t_] = {x[t], y[t]} /. First[%];
ParametricPlot[f[t], {t, 0, 10}]
points = First@Cases[%, l_Line :> First@l, Infinity];
Export["points.dat", points, "Table"]

HTH,

Alexey





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