An approach to modeling asymmetric multivariate spatial covariance structures

Bo Li, Hao Zhang

Research output: Contribution to journalArticle

Abstract

We propose a framework in light of the delay effect to model the asymmetry of multivariate covariance functions that is often exhibited in real data. This general approach can endow any valid symmetric multivariate covariance function with the ability of modeling asymmetry and is very easy to implement. Our simulations and real data examples show that asymmetric multivariate covariance functions based on our approach can achieve remarkable improvements in prediction over symmetric models.

Original languageEnglish (US)
Pages (from-to)1445-1453
Number of pages9
JournalJournal of Multivariate Analysis
Volume102
Issue number10
DOIs
StatePublished - Nov 1 2011

Keywords

  • Asymmetry
  • Bivariate matérn
  • Intrinsic model
  • Multivariate covariance function
  • Symmetry

ASJC Scopus subject areas

  • Statistics and Probability
  • Numerical Analysis
  • Statistics, Probability and Uncertainty

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