Dim.corSpatial: Dimensions of a corSpatial Object

In nlme: Linear and Nonlinear Mixed Effects Models

Dimensions of a corSpatial Object

Description

if groups is missing, it returns the Dim attribute of object; otherwise, calculates the dimensions associated with the grouping factor.

Usage

## S3 method for class 'corSpatial'
Dim(object, groups, ...)

Arguments

object	an object inheriting from class "corSpatial", representing a spatial correlation structure.
groups	an optional factor defining the grouping of the observations; observations within a group are correlated and observations in different groups are uncorrelated.
...	further arguments to be passed to or from methods.

Value

a list with components:

N	length of groups
M	number of groups
spClass	an integer representing the spatial correlation class; 0 = user defined class, 1 = corSpher, 2 = corExp, 3 = corGaus, 4 = corLin
sumLenSq	sum of the squares of the number of observations per group
len	an integer vector with the number of observations per group
start	an integer vector with the starting position for the distance vectors in each group, beginning from zero

Author(s)

José Pinheiro and Douglas Bates [e-mail]

See Also

Dim, Dim.corStruct

Examples

Dim(corGaus(), getGroups(Orthodont))

cs1ARMA <- corARMA(0.4, form = ~ 1 | Subject, q = 1)
cs1ARMA <- Initialize(cs1ARMA, data = Orthodont)
Dim(cs1ARMA)

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