Thank you very much Ashton and Jaime. I am thinking about them. But I would like to construct a ranking for the importance of these parameters. Thank you again, Gema
________________________________ De: Ashton Shortridge [mailto:ash...@msu.edu] Enviado el: mar 22/06/2010 0:11 Para: r-sig-geo@stat.math.ethz.ch CC: GEMA FERNANDEZ-AVILES CALDERON Asunto: Re: [R-sig-Geo] variogram parameters Well, all are very important for a good fit to your empirical semivariogram. Screw up one, and the curve won't be very close. Maybe what you are looking for is, how to start developing a good model. If so, I would say (based largely on experience teaching this): 1. anisotropy first. No point developing a crummy omnidirectional model 2. model form is next (spherical, exponential, etc) 3. nugget 4. sill and range And iterate 2-4 until it seems ok. Others surely have their own preferences.... Yours, Ashton On Monday 21 June 2010 16:31:16 GEMA FERNANDEZ-AVILES CALDERON wrote: > Dear list, > > I have a trivial but not easy quiestion for me. In a semivariogram you use > this parameters: > > a) partial sill > b) nugget > c) range > d) anisotropy parameters > > Please, could you ranking them beeing 1 the most important parameter? > > Thank you very much, > Gema > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- Ashton Shortridge Associate Professor ash...@msu.edu Dept of Geography http://www.msu.edu/~ashton 235 Geography Building ph (517) 432-3561 Michigan State University fx (517) 432-1671 [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
