A follow-up to my previous query. Say one of the results returned by contourLines() is
C.W <- contourLines(....) Then C.W is a list of (in this case 28) lists, each of which is a list with components $level (a single number), $x (the x coords of the points on a contour at that level) and $y (the y coords). I can of course get these individually with, for the 5th one for instance, C.W[[5]]$level C.W[[5]]$x C.W[[5]]$y But I can't see how to obtain, in one line and without running a nasty loop, to get all the levels at once! In other words, I'm looking for an expression which will return the vector c(C.W[[1]]$level,C.W[[2]]$level,...,C.W[[28]]$level) (This is probably something I should already have learned from the documentation, but I think I may have been asleep during that class ... ). 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: 19:57:09 ------------------------------ 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.
