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).
Thank you: W. --- "Dr. M.J. Abedini from Civil Eng." <[EMAIL PROTECTED]> wrote: > > > Mr. Webster > > First of all, C in that equation is covariance which > is totally different > from covariogram. > > As for c(0), first you need to specify which type of > anisotropy you have. > In geometric anisotropy, range is direction > dependent and sill [c(0)] is > constant while in zonal anisotropy, the sill is > direction dependent and > range is constant. You might have a combination of > geometric and zonal > anisotropy for which both sill and range are > direction dependent. You may > even have nugget effect anisotropy for which negget > is direction > dependent. > > I will create a list of papers on modeling > anisotropy and will forward it > to you shortly. > > Thanks > Abedini > > On Mon, 13 May 2002, jack webster wrote: > > > Hi all list members > > Suppose that g denote the semi-variogram and C > > denote the Covariogram functions. According to > > Cressie(1993, P. 67) the relation is > > g(h) = C(0) - C(h) > > where h is the distance vector.In the isotropic > case > > C(0) = total sill = c0 + > c > > I have an Anisotropic Variogram in which c is > varying > > with direction.Therefore my question is what is > C(0) > > in this case? > > > > ===== > > > > > > __________________________________________________ > > Do You Yahoo!? > > LAUNCH - Your Yahoo! Music Experience > > http://launch.yahoo.com > > > > -- > > * 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 > > > __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com -- * 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
