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 class 'corStruct' Dim(object, groups, ...)
Arguments
object | an object inheriting from class |
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 |
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 |
Author(s)
José Pinheiro and Douglas Bates [email protected]
See Also
Examples
Dim(corAR1(), getGroups(Orthodont))
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Licensed under the GNU General Public License.