Theory, Examples & Exercises
Section: Ordination analysis
vegan) - if the environmental matrix is not specified,
veganpackage calculates unconstrained correspondence analysis1).
vegan) - this function implements the original DECORANA program, written by Mark Hill in Fortran, into R. For historical reasons2), only four DCA ordination axes are returned, and this is not easy to change.
CA(P. Legendre, Numerical Ecology with R, called
CA.newrin the 2nd edition) - code can be found here.
vegan, there is also a package
cacalculating correspondence analysis, with
decoranais implementing the original Hill's algorithm for DCA introduced by Fortran program DECORANA, which itself can calculate only four ordination axes; CANOCO behaves in the same way.