Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1996
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1996

[Date Index] [Thread Index] [Author Index]

Search the Archive

extracting points plotted by ContourPlot

  • Subject: [mg3356] extracting points plotted by ContourPlot
  • From: easther at cfi.waseda.ac.jp (Richard Easther)
  • Date: 29 Feb 1996 15:19:47 -0600
  • Approved: usenet@wri.com
  • Distribution: local
  • Newsgroups: wri.mathgroup
  • Organization: Waseda University
  • Sender: daemon at wri.com


Hi! 

Can someone help me with the following problem. After doing a     

       figure =  ContourPlot[f[x,y], ..., Contours ->{0}], 

I want to extract the set of points actually plotted - ie a set of {x,y} 
where f[x,y] == 0 for some additional processing.

The command TextForm[InputForm[Graphics[ figure ]]] gives me a text 
string which has a series of Line commands that actually contains the 
{x,y} values that are plotted.

Now what I want to know is this: can someone tell me a nice (or even 
ugly but workable!) way of extracting the list(s) of points plotted by 
the Line command(s)?

If so I would be very grateful!

Richard
 

+=================================================================+
|    Richard Easther               No quote - just my address     |
| easther at cfi.waseda.ac.jp                                        |      
+=================================================================+


  • Prev by Date: extracting points plotted by ContourPlot
  • Next by Date: generating fractal sets
  • Previous by thread: extracting points plotted by ContourPlot
  • Next by thread: Solving sets of differential equations -- this should be easy...