On Thu, 24 Apr 2008, F. De Sales wrote: > > Hi all, > I was wondering if anyone in here is familiar with > the command "image.smooth". > How can set the arguments dx, dy and theta to > minimize the smoothing?
Read ?image.smooth in the fields package, and run the examples with various values until you can see what they do, with the alternative of reading the source code. > Is there any other way to get smoother contour > maps, ie, without so many sharp corners? The function is not adding any information, so if there are sharp corners in the contours, then there are sharp corners in the data, and smoothing is not your friend. One possibility is to change the resolution of the image, which should remove sharp boundaries that are only artefacts of the resolution - for example by interpolating to a denser grid. Roger > I'd appreciate any help. > Thank you very much. > > > > > > ____________________________________________________________________________________ > > [[elided Yahoo spam]] > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [EMAIL PROTECTED] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo