See: Wartenberg, D., S. Ferson, and F. J. Rohlf. 1987. Putting Things in Order - a Critique of Detrended Correspondence-Analysis. American Naturalist 129:434-448.
That paper basically points out that the method (at least at that time) does nothing but to hide the arch of the horseshoe. It does not change the ordering of points along the first axis - it just changes the scatter along the second axis so one does not see the arch. Jim ---------------------- F. James Rohlf, Distinguished Professor Dept. Ecology and Evolution, Stony Brook University, NY 11794-5245 From: Classification, clustering, and phylogeny estimation [mailto:[email protected]] On Behalf Of Shannon, William Sent: Thursday, March 25, 2010 10:49 AM To: [email protected] Subject: Question for the list What can people tell us about Detrended Correspondence Analysis Thank you Bill Shannon, PhD Associate Prof. of Biostatistics in Medicine Washington University School of Medicine 660 South Euclid Ave, Box 8005 St. Louis, MO 63110 [email protected]/314-454-8356 ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l
