GEOSTATS: References or code for Variograms of weighed data?
I have some
x y z weighting_factor value
Which I want to variogram; The one package (commercial) I found to do variograms of weighted data is, I beleive, wrong (Variogram of data with all values set to 5 was non zero and looked like white noise).
An iintuitive formula is
loop n samples
var(ilag) = var(ilag) +wtpti*wtptj* [(gradepti-gradeptj)]**2
wt(ilag) = wt(ilag) + (wtpi*wtpj)
end of loop
var(ilag) = var(ilag) * 0.5 / wt(ilag)
Does anyone have any code, refereneces or opinons on/for variography of weighed data>
Pincock, Allen and Holt, Inc.
International Mineral Consultants
274 Union Blvd Suite 200
303 914-4467 v
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