nlme (version 3.1-131)

Dim.corStruct: Dimensions of a corStruct 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 corStruct
Dim(object, groups, …)

Arguments

object
an object inheriting from class "corStruct", representing a 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.
some methods for this generic require additional arguments. None are used in this method.

Value

a list with components:
N
length of groups
M
number of groups
maxLen
maximum number of observations in a group
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 observations in each group, beginning from zero

See Also

Dim, Dim.corSpatial

Examples

Run this code
Dim(corAR1(), getGroups(Orthodont))

Run the code above in your browser using DataCamp Workspace