On Monday, September 10, 2001, at 12:19 PM, Isobel Clark wrote:
> Any basic Geostatistics book will show you models with
> varying ranges and sills with direction.
>
> Except mine. We believe that sill varying with
> direction is a symptom of deeper problems such as
> non-stationarity, trend, discontinuities, etc etc.
I'd be a bit suspicious if the sill changes in the X and
Y directions, but probably not as much if comparing
the horizontal sill to a (normally) different vertical value,
due to the gravity component.
Syed
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