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Hi, I would obtain a random value between two (for example between 40.15 and 56.58 I would have only one value). I'm looking for a package/a function which could do this. Could anybody help me please? Cordialement Damien Landais

...or(z in 0:10){ mydata[i,]=c(x,y,z) i=i+1 z=z+2} y=y+4} x=x+2} And I would have something like that x y z 0 0 0 0 0 2 0 0 4 0 0 6 0 0 8 0 0 10 0 4 0 0 4 2 ... Could anybody help me? I don't work on a special package to do it... Thanks Cordialement Damien Landais

Hi, I would know how to plot two variograms on a same graph. I can plot one by one but I would draw both on the same one. Is it possible? Do i need any special package? Thanks! Cordialement Damien Landais

...op structure). I thought "factors" could do the job but I didn't manage to use them for that problem. ---------------------------------------------------------------------------- Pascal BLEUYARD Laboratoire de M?t?orologie Physique (LaMP) OPGC, Universit? Blaise Pascal 24, avenue des Landais 63177 AUBIERE CEDEX T?l : 04 73 40 73 75 Fax : 04 73 40 51 36 M?l : P.Bleuyard at opgc.univ-bpclermont.fr

...","y","z","E","taille") g=gstat(id="zinc",formula=mydata[,4]~1,locations=~x+y+z,data=mydata) g.var=variogram(g,cutoff=2500,width=100) modele=vgm(model="Exp",range=2000) vario=fit.variogram(g.var,modele) Thanks! Cordialement Damien Landais