Correlation Structure Classes

DESCRIPTION:

Standard classes of correlation ( corStruct) structures available in the nlme3 library.

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
corBand
banded correlation structure
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 quadratic spatial correlation
corSpher
spherical spatial correlation
corStrat
stratified correlation structure
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 the corSymm and corAR1 classes.

SEE ALSO:

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