From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>

Date: Thu 23 Jun 2005 - 00:57:53 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jun 23 01:18:50 2005

Date: Thu 23 Jun 2005 - 00:57:53 EST

Bernard L. Dillard wrote:

> Hello all.

*>
**> I'm confused a bit about contour plots. After reading the help at
**> "?contour", it seems as though the contour plot is for 3D plots (x,y, and
**> z). My data is in the form of grid coordinates (x,y), and I want to see a
**> contour plot of the data so that I can tell where most observations lie.
**> My question is simple but still evasive.
**>
**> Say my data is called places. One column is X and another is Y. Or,
**>
**> places$X places$Y
**>
**> Coordinate 1 32 50
**> Coordinate 2 15 33
**> Coordinate 3 28 20
**> etc
**>
**> How do I get R to do the contour plot with no third "z" coordinate?
*

For just 2 columns, a contour plot does not make much sense, I guess. I think an image() makes much more sense in this case.

Your z matrix consists of the entries of the data.frame/matrix given above, the x and y vectors are the column and row numbers.

Uwe Ligges

*> Thanks.
**>
*

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jun 23 01:18:50 2005

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