You are correct that the Euclidean distance between sample and species points is NOT what you need to look at. For interpretations of CA plots: Michael Greenacre. 1984 Theory and applications of correspondence analysis. Academic Press Greenacre, M. and T. Hastie. 1987. The geometric interpretation of correspondence analysis. J. Am. Stat. Assoc. 82: 437-447. Legendre, L. and P. Legendre. 1998. Numerical ecology, 2nd English Edition.Elsevier, Amsterdam. In article <8p2tn2$hsb$[EMAIL PROTECTED]>, Thomas Hayes <[EMAIL PROTECTED]> wrote: > I am trying to find a clear explanation of how joint plot produced by > correspondence analysis should be interpreted. I have read that > distance between variables or between cases are meaningful, but not > between variables and cases. If I understood correctly, the > relationship between cases and variables should be assessed by > interpreting the axis rather than individual points. > > Is this accurate? Is there a web site or a book where I can find clear > examples of adequate and inadequate interpretations? > > Thomas > > Sent via Deja.com http://www.deja.com/ > Before you buy. > -- Eugene D. Gallagher ECOS, UMASS/Boston Sent via Deja.com http://www.deja.com/ Before you buy. ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
