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• W1786926695 abstract "We consider modeling of angular or directional data viewed as a linear variable wrapped onto a unit circle. In particular, we focus on the spatio-temporal context, motivated by a collection of wave directions obtained as computer model output developed dynamically over a collection of spatial locations. We propose a novel wrapped skew Gaussian process which enriches the class of wrapped Gaussian process. The wrapped skew Gaussian process enables more flexible marginal distributions than the symmetric ones arising under the wrapped Gaussian process and it allows straightforward interpretation of parameters. We clarify that replication through time enables criticism of the wrapped process in favor of the wrapped skew process. We formulate a hierarchical model incorporating this process and show how to introduce appropriate latent variables in order to enable efficient fitting to dynamic spatial directional data. We also show how to implement kriging and forecasting under this model. We provide a simulation example as a proof of concept as well as a real data example. Both examples reveal consequential improvement in predictive performance for the wrapped skew Gaussian specification compared with the earlier wrapped Gaussian version." @default.
• W1786926695 created "2016-06-24" @default.
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• W1786926695 date "2015-09-28" @default.
• W1786926695 modified "2023-09-23" @default.
• W1786926695 title "The wrapped skew Gaussian process for analyzing spatio-temporal data" @default.
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• W1786926695 doi "https://doi.org/10.1007/s00477-015-1163-9" @default.
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