[R] implicit functions (was r-help)

[Duncan Murdoch]

On 03/08/2011 11:21 AM, KnifeBoot wrote:
>    Hey,
>      Is there any function plotting several "implicit functions" (F(x,y)=0) on the same fig.     Is there anyone who has an example code of how to do this?
>      The contour3d function in the misc3d package only work with the  functions with three dimensions.
>      Thanks a lot.

contour() will do it.  Use add=TRUE to add extra functions.

Duncan Murdoch

P.S. Please use a more informative subject line!