A robust test for isotropy in 2D lattice data is introduced using robust variogram estimators and block permutation resampling to control significance levels under strong dependence and outliers.
Knight and Geir Kvaran , doi =
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A robust nonparametric test for spatial isotropy in lattice data
A robust test for isotropy in 2D lattice data is introduced using robust variogram estimators and block permutation resampling to control significance levels under strong dependence and outliers.