I believe you are looking for the function contourLines() in package
graphics.
At some point in the intervening years there was a clines package on CRAN,
and if you know that you can find it at
http://cran.r-project.org/src/contrib/Archive/C/clines_2.0-2.tar.gz
That confirms it has been superse
I realize that as of yesterday, this message thread is 4 years old but can
someone possibly post the clines function that Renaud mentions in the
posting below? That would be wonderful and most appreciated.
Thanks,
Andrew
Andrew Niccolai
Doctoral Candidate
Yale School of Forestry
From: Rena