Dear Lorenz:
You cannot use the power model in the case of indicator variograms.
The variogram g(h) of a random set (indicator 0 or 1) has the following relationships
(not accomplished by the power variogram):
g(h) <= 0.5
g(2h) <= 2g(h)
Regards,
Marco
"Dobler, Lorenz" wrote:
> Hello list,
>
> I am dealing with heavy metals in upper soil layers of forests. Some
> of my (indicator) variograms behave like a spherical model at the
> beginning but in stead of reaching the sill they behave like a
> power-model for greater distances. I tried
> several power models but they didn't fit the variogram very well.
> Just two questions:
>
> 1. What does this special behavior of the experimental variogram tell
> me about the spatial structure or stationarity?
> 2. Can I �mix" a spherical and and a power model to build up one
> nested model?
>
> Hope somebody can help
> Bye
> Lenz
>
> --
> * To post a message to the list, send it to [EMAIL PROTECTED]
> * As a general service to the users, please remember to post a summary of any useful
>responses to your questions.
> * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and
>"unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO
>NOT SEND Subscribe/Unsubscribe requests to the list
> * Support to the list is provided at http://www.ai-geostats.org
--
* To post a message to the list, send it to [EMAIL PROTECTED]
* As a general service to the users, please remember to post a summary of any useful
responses to your questions.
* To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe
ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND
Subscribe/Unsubscribe requests to the list
* Support to the list is provided at http://www.ai-geostats.org
