MathGroup Archive 2004

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Questions about Graph output

  • To: mathgroup at
  • Subject: [mg49200] Questions about Graph output
  • From: Daohua Song <ds2081 at>
  • Date: Wed, 7 Jul 2004 01:42:39 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Dear Friends,
      (1)I saw several lines about how to save a graph in the forum before, 
but i can not catch the point. how does it work?
      plt1 = Plot[Sin[x], {x, 0, 2Pi}];
      mydata = Flatten[Cases[plt1, Line[x__] -> x, Infinity], 1];
      Export["mydata.txt", mydata, "CSV"];

      (2) If i use implicit plot or contour plot, for example 
draw f[x,y]==Constant. My question is :
     how to save the curve to data points i can deal with(just like (1)),
so i can work out the perimeter of this curve, area if it is closed etc.

      Thank you very much!

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