corClasses               package:nlme               R Documentation

Correlation Structure Classes

Description:

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

 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):

     Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates
     bates@stat.wisc.edu

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'

