Ordination (statistics)
2139778
215515564
2008-05-28T15:22:28Z
Melcombe
4682566
revised category
In [[multivariate statistics|multivariate analysis]], '''ordination''' is a method complementary to [[data clustering]], and used mainly in [[exploratory data analysis]] (rather than in [[hypothesis testing]]). Ordination [[partially ordered set|orders]] objects that are characterized by values on multiple variables (i.e., multivariate objects) so that similar objects are near each other and dissimilar objects are further from each other. These relationships between the objects, on each of several axes (one for each variable), are then characterized numerically and/or graphically. Many ordination techniques exist, including [[principal components analysis]] (PCA), non-metric [[multidimensional scaling]] (NMDS), [[correspondence analysis]] and its derivatives (CA, DCA, CCA), Bray-Curtis ordination, and [[redundancy analysis]] (RDA), among others.
==Uses==
*Ordination can be used on the analysis of any set of multivariate objects. It is frequently used in several environmental or ecological sciences, particularly plant [[community ecology]]. It is also used in [[genetics]] and [[systems biology]] for [[microarray]] data analysis, and in [[psychometrics]].
==See also==
*[[Data clustering]]
*[[Multivariate statistics]]
*[[Principal components analysis]]
*[[Multidimensional scaling]]
== References ==
*Gauch, H. G., Jr. 1982. Multivariate Analysis in Community Ecology. Cambridge University Press, Cambridge.
*Jongman et al, 1995. Data Analysis in Community and Landscape Ecology. Cambridge University Press, Cambridge.
*Birks, H.J.B, 1998. An Annotated Bibliography Of Canonical Correspondence Analysis And Related Constrained Ordination Methods 1986-1996. Botanical Institute, University of Bergen. World Wide Web: http://www.bio.umontreal.ca/Casgrain/cca_bib/index.html
== External links ==
#General
#*http://ordination.okstate.edu/
#*http://userwww.sfsu.edu/~efc/classes/biol710/ordination/ordination.htm
#Specific Techniques
#*http://www.statsoft.com/textbook/stcoran.html
#*http://userwww.sfsu.edu/~efc/classes/biol710/ordination/CA.htm
#*http://www.statsoft.com/textbook/stmulsca.html
#*http://www2.chass.ncsu.edu/garson/pa765/correspondence.htm
#*http://www.statsoft.com/textbook/glosfra.html
#Software
#*http://home.centurytel.net/~mjm/pcordwin.htm
#*http://www.microcomputerpower.com/catalog/canoco.html
#*http://www.brodgar.com
[[Category:Multivariate statistics]]