deform

Methods for fitting nonstationary Gaussian process models by spatial deformation, as introduced by Sampson and Guttorp (1992) doi:10.1080/01621459.1992.10475181, and by dimension expansion, as introduced by Bornn et al. (2012) doi:10.1080/01621459.2011.646919. Low-rank thin-plate regression splines, as developed in Wood, S.N. (2003) doi:10.1111/1467-9868.00374, are used to either transform co-ordinates or create new latent dimensions.