fwdtr.object {Rfwdmv}R Documentation

fwdtr.object

Description

An object containing estimates of transformation parameters on multivariate data. The class attribute is set to fwdtr.

Format

A fwdtr.object is a list with the following elements:

call
the matched call.
Unit
a list containing the units forming the subset in each step of the search.
n
an integer, the number of units in the data.
p
an integer, the number of variables in the data.
m
an integer, the number of units in the initial subset.
data
a numeric matrix containing the data, the dimnames attribute is set to NULL.
data.H0
a numeric matrix containing the data transformed using lambda under the null hypotehsis.
data.name
the name of the data frame or matrix containing the multivariate data set.
data.names
a list of character vectors containing the row and column names of the data.
Mle
a matrix containing the estimates of transformation parameters in each step of the forward search. The number of columns of matrix Mle is equal to the length of vector col.to.transform or is equal to 1 if one.lambda = TRUE.
H0
k x 4 matrix. The first column contains the values of lambda (transformation paramters) which have been used to transform the variables to order Mahalanobis distances during the forward search. The second column contains the integers associated to the columns for which we computed maximum likelihood estimates. The third and fourth column contain respectively the constrained lower and upper bounds of the estimates of the values of the transformation parameters.
forced.onepar
Logical value. if TRUE a common value of lambda is estimated for all variables specified in col.to.transform.
dof
scalar integer value containing the degrees of freedom to be used in the likelihood ratio test.

Details

Class fwdtr object is created by function fwdtr.

See Also

fwdmv.init
fit an ititial multivariate forward search.
fwdmv
fit a multivariate forward search with user specified tentative groups.

Examples

data(mussels.dat)
l.mle <- fwdtr(mussels.dat)

#l.mle is a fwdtr object.

[Package Rfwdmv version 0.72-2 Index]