Test of spatial autocorrelation based on a large-sample normal approximation. The cross-product statistic is the lag one omnidirectional semivariogram. Fit Gaussian semivariogram model by weighted least squares. Regression with spatially correlated errors and heterogeneous variances. Fit model using ML estimation in SAS proc mixed.
Covariance function includes a nugget effect.
Compute correlograms, semivariograms, cross-variograms, etc., print and plot results. Labs and data for homework Lab 1. Lab 2. generate uniform random numbers Pablo Crespell's data Disease presence data. Field 1 Lab 4 part 1. Modules in IML Lab 4 part 2.