[R] Plotting implicit functions in R

Duncan Murdoch murdoch at stats.uwo.ca
Thu Nov 12 12:47:00 CET 2009

Rofizah Mohammad wrote:
> Hello,
> How can I plot several implicit functions (F(x,y)=0) on the same figure?

You can use contour(..., levels=0), then repeat with add=T.  See the 
examples in ?contour to set up the inputs.

Duncan Murdoch

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