Understanding Anisotropy Computations

摘要: Most descriptions of anisotropy make reference to reduced distances and conversion anisotropic models isotropic counterparts equations are presented for a certain class range-anisotropic models. Many state that sill is modelled using structure having very elongated ellipse. The presentations typically have few or no intervening steps. Students applied researchers rarely follow these subsequently regard the programs compute variograms as black-boxes, contents which too complex try understand. We provide geometry necessary clarify those computations. In so doing, we general way model any type (range, sill, power, slope, nugget) on an note cases in literature printed ellipse do not match stated coded An example provided both range- sill-anisotropic structures fitted experimental variogram values from elevation data set weighted nonlinear regression. original plotted with surfaces view fit many directions at once.