[R] simplest possible xyz plot

Thomas Lumley tlumley at u.washington.edu
Thu Dec 30 16:41:01 CET 2004

On Wed, 29 Dec 2004, t takahashi wrote:

> New to R, and didn't find the following in the docs.
> Main use for R. to get feet wet, is to pipe in x,y,z data, one point
> per line, and
> plot it in 3d, like this:
> {
> echo 1,2,3
> echo 2,4,6
> ...
> } | R ...
> But functions like contour seem to require index vectors that are
> sorted.  I am curious why, and how to convert.

In addition to Uwe's points, if the elevation data are in a matrix then 
these functions do not require any index vectors.


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