Coinertia analysis
Description
Performs a coinertia of the triplets (Q_1,K_1,R_0) and (Q_2,K_2,R_0).
Usage
1 2 3 4 5 6 7  fitCoinertia(X, Dp, Y, Dq, Dn, n.axes)
## S3 method for class 'fitCoinertia'
summary(object, ...)

Arguments
X 
Q_1, matrix of expected abundances under rowcolumn
independence in the original 
Dp 
K_1, species (column) weights for 
Y 
Q_2, matrix of expected abundances under rowcolumn
independence in the original 
Dq 
K_2, species (column) weights for 
Dn 
site weights R_0. 
n.axes 
number of axes to calculate the coinertia analysis for. 
object 
an object of class 
axes 
the number of axes to display when printing. 
... 
arguments passed to other functions. Currently ignored. 
Value
A list with the following components:
U1 
column weights of 
U2 
column weights of 
X1 
rowscores of 
X2 
rowscores of 
lambda 
the Eigenvalues (squares of the singular values). 
n.axes 
number of axes requested. 
call 
the matched function call. 
Note
This function is not yet meant to be called directly by the
user. If you wish to use it directly, see the function definition for
symcoca
which demonstrates how to prepare the
relevant input matrices.
Note that in this function, X
corresponds to the input
matrix y
and Y
corresponds to the
input matrix x
in symcoca
.
Confusing! This will be changed in a future release but for now the
arguments follow those of the original Matlab code  perhaps a little
too closely!
Author(s)
Original Matlab code by C.J.F. ter Braak and A.P. Schaffers. R port by Gavin L. Simpson.
References
Ter Braak, C.J.F and Schaffers, A.P. (2004) CoCorrespondence Analysis: a new ordination method to relate two community compositions. Ecology 85(3), 834–846
Doledec, S and Chessel, D. (1994) Coinertia analysis: a method for studying speciesenvironment relationships. Freshwater Biology 31, 277–294
See Also
symcoca
for the function that calls
fitCoinertia
and coinertiaI
for coinertia analysis
using identity matrices for K_1, K_2, and R_0