Dim.corSpatial function

Dimensions of a corSpatial Object

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

## 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.

Returns

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 bates@stat.wisc.edu

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)