PROC VARIOGRAM performs this grouping with two required options for variogram computation: the LAGDISTANCE= and MAXLAGS= options. The meaning of the required LAGDISTANCE= option is as follows.

VARIOGRAM Procedure The VARIOGRAM procedure computes sample or empirical measures of spatial continuity for two-dimensional spatial data. These continuity measures are the regular semivariogram, a ...

John Haslett, On the Sample Variogram and the Sample Autocovariance for Non-Stationary Time Series, Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 46, No. 4 (1997), pp.

In longitudinal studies, the effect of various treatments over time is usually of prime interest. However, observations on the same subject are usually correlated and any analysis should account for ...