corClasses               package:nlme               R Documentation

_C_o_r_r_e_l_a_t_i_o_n _S_t_r_u_c_t_u_r_e _C_l_a_s_s_e_s

_D_e_s_c_r_i_p_t_i_o_n:

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

_V_a_l_u_e:

     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.

_N_o_t_e:

     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'.

_A_u_t_h_o_r(_s):

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

_R_e_f_e_r_e_n_c_e_s:

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

_S_e_e _A_l_s_o:

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