[R] Variogram

[Leaf Sun]

Dear All,

Is there anybody has the experience in using variogram(gstat) ? Please kindly give me some hints about the results.


I used variogram() to build a semivariogram plot as:

tr.var=variogram(Incr~1,loc=~X+Y,data=TRI2TU,width=5)

then fir the variogram to get the parameters as:

 v.fit = fit.variogram(tr.var,vgm(0.5,"Exp",300,1))

v.fit
  model    psill    range
1   Nug 1.484879  0.00000
2   Exp 3.476700 29.70914

This is the output of v.fit. Can anybody help me write the exponential formula for this variogram?  I have the problem in understanding the result.

Thanks!

Leaf