Research article - Peer-reviewed, 2003
A simple method for weighted bending of genetic (co)variance matrices
Jorjani H, Klei L, Emanuelson UAbstract
Due to computational demand, elements of genetic correlation matrices may have been estimated separately and then combined together into a single correlation matrix at a later stage. Because these matrices should be positive definite (PD) a statistical method commonly known as "bending" is used to make them positive definite. The conventional bending method ignores the reliability of different correlations and may subject; any of them to change in order to make a positive definite correlation matrix. A simple method to obtain a weighted bended matrix to be used in animal breeding applications is proposed, and the implementation of the method is demonstrated by an exampleKeywords
genetic correlation matrix; covariance matrices; weighted bendingPublished in
Journal of Dairy Science2003, volume: 86, number: 2, pages: 677-679
Publisher: AMER DAIRY SCIENCE ASSOC
Authors' information
Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics
Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics
Klei, L
UKÄ Subject classification
Animal and Dairy Science
Veterinary Science
Publication Identifiers
DOI: https://doi.org/10.3168/jds.S0022-0302(03)73646-7
URI (permanent link to this page)
https://res.slu.se/id/publ/215