Package: influence.ME
Type: Package
Title: Tools for recognizing influential data in mixed models
Version: 0.6
Date: 2009-05-01
Author: Rense Nieuwenhuis, Ben Pelzer, Manfred te Grotenhuis
Maintainer: Rense Nieuwenhuis <contact@rensenieuwenhuis.nl>
Description: influence.ME provides a collection of tool for calculating
measures of influential data for mixed effects models. The
basic rationale behind identifying influential data is that
when iteratively single units are omitted from the data, models
based on these data should not produce substantially different
estimates. To standardize the assessment of how influential a
(single group of) observation(s) is, several measures of
influence are common practice. First, DFBETAS is a standardized
measure of the absolute difference between the estimate with a
particular case included and the estimate without that
particular case. Second, Cook's distance provides an overall
measurement of the change in all parameter estimates, or a
selection thereof.
License: GPL-3
URL: http://www.rensenieuwenhuis.nl/r-project/influenceme/
Depends: lme4, lattice
LazyLoad: yes
Packaged: 2009-04-25 12:43:46 UTC; Rense
Repository: CRAN
Date/Publication: 2009-04-26 15:27:54

Package: influence.ME
Type: Package
Title: Tools for detecting influential data in mixed effects models
Version: 0.7
Date: 2009-07-06
Author: Rense Nieuwenhuis, Ben Pelzer, Manfred te Grotenhuis
Maintainer: Rense Nieuwenhuis <contact@rensenieuwenhuis.nl>
Description: influence.ME provides a collection of tools for
calculating measures of influential data for mixed effects
models. It analyses models that were estimated using lme4. The
basic rationale behind identifying influential data is that
when iteratively single units are omitted from the data, models
based on these data should not produce substantially different
estimates. To standardize the assessment of how influential a
(single group of) observation(s) is, several measures of
influence are common practice. First, DFBETAS is a standardized
measure of the absolute difference between the estimate with a
particular case included and the estimate without that
particular case. Second, Cook's distance provides an overall
measurement of the change in all parameter estimates, or a
selection thereof.
License: GPL-3
URL: http://www.rensenieuwenhuis.nl/r-project/influenceme/
Depends: lme4, lattice
LazyLoad: yes
Packaged: 2009-07-02 12:59:15 UTC; Rense
Repository: CRAN
Date/Publication: 2009-07-18 16:11:29