> " How can we estimate Sill and Range in all
> directions by supposing that the sill is fixed?
It is usual to fit the sill to an omni-directional
semi-variogram graph, since that has most pairs on all
points.
The ranges can then be fitted individually.
The alternate is to 'contour' the experimental
semi-variograms in many directions and fit one
ellipoidal surface to the 'map'.
Isobel
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