Standard classes of correlation structures (corStruct)
available in the nlme package.
Available standard classes:
autoregressive process of order 1.
autoregressive moving average process, with arbitrary orders for the autoregressive and moving average components.
continuous autoregressive process (AR(1) process for a continuous time covariate).
compound symmetry structure corresponding to a constant correlation.
exponential spatial correlation.
Gaussian spatial correlation.
linear spatial correlation.
Rational quadratics spatial correlation.
spherical spatial correlation.
general correlation matrix, with no additional structure.
José Pinheiro and Douglas Bates [email protected]
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.
corAR1, corARMA,
corCAR1, corCompSymm,
corExp, corGaus,
corLin,
corRatio, corSpher,
corSymm,
summary.corStruct