Hi Ted, Here's what the last example in ?contour says:
"## contourLines produces the same contour lines as contour" So, even without digging into the source, I would guess that your hunch is correct. Cheers, Peter Ehlers (Ted Harding) wrote:
Hi Folks, I have been using contour() to produce some contour plots (of a spatially-smooted density produced by kde2d()), with very satisfactory results. I now want access to the coordinates of the points on the contours, and it would seem that contour() does not return a value, so there is nothing from which these could be extracted. However, apparently contourLines() does, and it seems to be invoked in essentially the same way (so far as the x,y,z and levels parameters are concerned). However, I am not sure whether the contour lines generated by contourLines() are the same numerically as those generated (at any rate plotted) by contour(). By over-plotting the coordinates from contourLines() on the contours plotted by contour(), it looks as though they may be the same. Advice would be appreciated! With thanks, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 22-Oct-09 Time: 19:03:37 ------------------------------ XFMail ------------------------------ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
