511AI-GEOSTATS: hole effect
- Jan 25, 2002Dear list,
I am working with vegetation data, and I have got some variograms
that are characterized by the presence of a hole effect that I
would like to model. I have found in the manual of GSLIB (2nd
edition) a model with a periodical component that can be fitted to
such data, but the authors remark that this model valid only in one
direction. Since I am working with omnidirectional variograms in a
two-dimensional grid, I would be very grateful if somebody could give
me any indication about where I can find conditional negative semi-
definite (CNSD) models that incorporate a periodic component and that
are valid for two-dimensional data.
Many thanks in advance for your attention.
Fernando T. Maestre
Departamento de Ecología
Universidad de Alicante
Apdo correos 99
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