Can you share your variogram (a graph) and your initial parameters? On Wed, Feb 8, 2017 at 1:55 AM, Kareem Longwe <kareemlon...@gmail.com> wrote:
> Dear all > I am trying to fit a model variogram, but I am stuck on *ini.cov.pars. *I > am working in R. > > Would anyone give me a clue how to estimate the 'partial sill and range'. I > have tried changing numbers but I continuously get the following error > message in R: > > Warning messages: > 1: In variofit(vario.pht, cov.model = "exponential", ini.cov.pars = > initial.values, : > unreasonable initial value for sigmasq (too high) > 2: In variofit(vario.pht, cov.model = "exponential", ini.cov.pars = > initial.values, : > unreasonable initial value for sigmasq + nugget (too high). > > Thanks > > *Kareem Longwe* > *NEPADSAN*Bio Student Ambassador > MSc Student, Agronomy > Lilongwe University of Agriculture and Natural Resources > P.O. Box 219. > > klon...@bunda.luanar.mw > +265 996 31 66 22 > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo