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 |
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