My main problem is to use a spline cubic smooth (I hope this understanding, my english is not perfect ... ), and I would like to smooth the contours of my maps with my own scale of levels (e.G., levels are 1,3,5,10,20,30,40,50,75,...) so it is not easy to find a function which consider this two constrains, and I don't see how gPolygon can help me (in it doc, I have seen this function cut polygon in a set of subpolygon.
Le 24 mai 2011 à 10:18, Barry Rowlingson a écrit : > On Mon, May 23, 2011 at 8:00 PM, Duncan Murdoch > <murdoch.dun...@gmail.com> wrote: >> On 11-05-23 5:55 AM, Pierre Bruyer wrote: > >> >> I think writing that would be hard, but you can fake it. Find the range of >> z first to work out the contour levels you want, then put very large values >> around the outside of the z matrix. (You can't use Inf, but big finite >> values will work.) > > I had a play with this yesterday, expecting gPolygonize from rgeos to > do the heavy lifting. But all I could make it do with contours from > the standard volcano data, converted to the appropriate SpatialLines > form, was segfault. Works fine on the examples given in the > gPolygonize docs. > > That was an end-of-day ten minute experiment, so I might have another go > later. > > B ______________________________________________ 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.
