if
groups is missing, it returns the
Dim attribute of
object
; otherwise, calculates the dimensions associated with
the grouping factor.
USAGE:
Dim(object, groups)
REQUIRED ARGUMENTS:
object
an object inheriting from class
corSpatial,
representing a spatial correlation structure.
OPTIONAL ARGUMENTS:
groups
an optional factor defining the grouping of the
observations; observations within a group are correlated and
observations in different groups are uncorrelated.
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