[R-sig-Geo] variogram problem

[adeela uaf]

Hi,
Can anybody help me in fitting variogram in gstat package in R. I am trying
but having this problem. Where Cd15 is the amount of Cadmium in soil at 15
cm depth.
v<-variogram(Cd15~1,data)
v.fit<-fit.variogram(v,vgm(1,"Sph",5,1))
Warning message:
In fit.variogram(v, vgm(1, "Sph", 5, 1)) :
Warning: singular model in variogram fit
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Adeela
University of Agriculture Faisalabad
Department of Math & Stat.

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