On Montag, 28. August 2006 07:42 schrieb [EMAIL PROTECTED]:
> Do stationary hypothesis variograms have a sill,

Yes, variograms of weakly stationary random fields have a sill: the variance 
of the field.  

> and intrisic hypothesis variograms have no sill.

They might have no sill, but they also might have. The intrinsic hypothesis is 
more general than weakly stationary random fields and includes fields with 
and without sill. 

> Does this mean intrisic hypothesis variograms
> indicate a trend.

No, a trend is indicated by a variogram increasing as h^2 for long distances 
but legal intrinsic variograms increase more slowly than h^2 e.g. as h^1

Best regards,
Gerald v.d. Boogaart

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-- 
-------------------------------------------------
Prof. Dr. K. Gerald v.d. Boogaart
Professor als Juniorprofessor fuer Statistik
http://www.math-inf.uni-greifswald.de/statistik/  

B�ro: Franz-Mehring-Str. 48, 1.Etage rechts
e-mail: [EMAIL PROTECTED]
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fax:    00+49 (0)3834/86-4615   (Institut)

paper-mail:
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Institut f�r Mathematik und Informatik
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Germany
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