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AI-GEOSTATS: Valid Variograms

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  • Bilisoly, Roger L
    Hello All, If fi(z) are valid, then f(z) = Sum(wi*fi(z),i) is valid if the weights wi valid. Furthermore, f(g(z)) is valid for several g s: 1) g(z) = |z| is an
    Message 1 of 1 , Mar 20, 2003
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      Hello All,

      If fi(z) are valid, then f(z) = Sum(wi*fi(z),i) is valid if the weights wi
      valid.
      Furthermore, f(g(z)) is valid for several g's:

      1) g(z) = |z| is an isotropic model
      2) g(z) = zx (or zy) is a zonal model
      3) g(z) = Sqrt((zx/ax)^2 + (zy/ay)^2) is a geometric model

      Are there other g's that still give valid models?

      Thanks for any insight on this!

      Roger

      Roger L. Bilisoly, Ph.D.
      Geohydrology Department
      Sandia National Laboratories
      PO Box 5800 MS 0735
      Albuquerque, NM 87185-0735
      Phone: 505-844-5165
      Fax: 505-844-7354
      E-mail: rlbilis@...



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