corClasses: Correlation Structure Classes

In nlme: Linear and Nonlinear Mixed Effects Models

Correlation Structure Classes

Description

Standard classes of correlation structures (corStruct) available in the nlme package.

Value

Available standard classes:

corAR1	autoregressive process of order 1.
corARMA	autoregressive moving average process, with arbitrary orders for the autoregressive and moving average components.
corCAR1	continuous autoregressive process (AR(1) process for a continuous time covariate).
corCompSymm	compound symmetry structure corresponding to a constant correlation.
corExp	exponential spatial correlation.
corGaus	Gaussian spatial correlation.

corLin	linear spatial correlation.
corRatio	Rational quadratics spatial correlation.
corSpher	spherical spatial correlation.
corSymm	general correlation matrix, with no additional structure.

Note

Users may define their own corStruct classes by specifying a constructor function and, at a minimum, methods for the functions corMatrix and coef. For examples of these functions, see the methods for classes corSymm and corAR1.

Author(s)

José Pinheiro and Douglas Bates [e-mail]

References

Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.

See Also

corAR1, corARMA, corCAR1, corCompSymm, corExp, corGaus, corLin, corRatio, corSpher, corSymm, summary.corStruct

nlme documentation built on Nov. 27, 2023, 5:09 p.m.