Re: extracting points plotted by ContourPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg3378] Re: [mg3356] extracting points plotted by ContourPlot
- From: "Dennis M. Schneider" <dschneid at knox.edu>
- Date: Sat, 2 Mar 1996 04:15:13 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Hi Richard:
The following will do what you want.
Cases[Graphics[figure], Line[x_] :> x,Infinity]
Dennis M. Schneider
Knox College
On Thu, 29 Feb 1996, Richard Easther wrote:
>
> 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 |
> +=================================================================+
>
>
==== [MESSAGE SEPARATOR] ====