Dear Jack Webster, The mapping of the variogram to the covariogram is not one to one. When c(h) is a covariogram having g(h) as variogram, then c(h)+k for any positive real number k has the same variogram. Thus for your simulations it is appropriate to use c(h)=k-g(h) for any k larger than (or equal to) the maximum (or supreme) of your directional sills.
Best regards Gerald v.d. Boogaart jack webster wrote: > > Hi Dear doctor Abedini > I have constructed a more general variogram model, in > which all of the parameters are varying with > direction. My model more general than range anisotropy > and sill anisotropy. Since I want to simulate from > this model ,with cholesky decomposition method, I need > the covariogram model, which is respected to my > variogram model. Therefore I need the relation between > variogram and covariogram. In fact I need to specify > C(0). -- * 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
