Dimensions of a corSpatial Object - R Documentation

`Dim.corSpatial` 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 [email protected]

Examples

Dim(corGaus(), getGroups(Orthodont))

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

Dim.corSpatial Dimensions of a corSpatial Object