Hi. Itry to estmate prameters of vaigrm by fit.vaiogram.gls: rm(list=ls()) library(gstat) memory.limit(4000) data(meuse) coordinates(meuse)<-~x+y v.fit4<-fit.variogram.gls(log(zinc)~1, meuse[1:40,], vgm(1, "Sph", 900,1)) the results are: [1] -1.939367e-17 6.324797e-01 4.123851e+02 [1] 4.846680e-05 7.312376e-01 3.661078e+02 [1] 4.846680e-05 2.421149e-01 5.450078e+02 [1] 4.846680e-05 2.968638e-01 7.078753e+02 [1] 4.846680e-05 3.525650e-01 8.629175e+02 [1] 4.846680e-05 4.078170e-01 1.013148e+03 [1] 4.846680e-05 4.624658e-01 1.160053e+03 [1] 4.846680e-05 5.165518e-01 1.304490e+03 [1] 4.846680e-05 5.701438e-01 1.361356e+03 [1] 4.846680e-05 5.912904e-01 1.361355e+03 [1] 4.846680e-05 5.912685e-01 1.361355e+03(**) Warning message: In fit.variogram.gls(log(zinc) ~ 1, meuse[1:40, ], vgm(0.04, "Mat", : range parameter at search space boundary Does the las model (**) is my answer?? I have changed the start values several times but The warning remain. Thanks.
Saman Monfared Msc Student, Department of Statistics, Shiraz University, Shiraz 71454, Iran Email: Samanmonfared1 at gmail.com Tel: +98 917 5305167