mcoa {ade4}R Documentation

Multiple CO-inertia Analysis

Description

performs a multiple CO-inertia analysis, using an object of class ktab.

Usage

mcoa(X, option = c("inertia", "lambda1", "uniform", "internal"), 
    scannf = TRUE, nf = 3, tol = 1e-07)
print.mcoa (x, ...)
summary.mcoa (object, ...)
plot.mcoa (x, xax = 1, yax = 2, eig.bottom = TRUE, ...)

Arguments

X an object of class ktab
option a string of characters for the weightings of the arrays options :
"inertia"
weighting of group k by the inverse of the total inertia of the array k
"lambda1"
weighting of group k by the inverse of the first eigenvalue of the k analysis
"uniform"
uniform weighting of groups
"internal"
weighting included in X$tabw
scannf a logical value indicating whether the eigenvalues bar plot should be displayed
nf if scannf FALSE, an integer indicating the number of kept axes
tol a tolerance threshold, an eigenvalue is considered positive if it is larger than -tol*lambda1 where lambda1 is the largest eigenvalue.
x, object an object of class 'mcoa'
... further arguments passed to or from other methods
xax, yax the numbers of the x-axis and the y-axis
eig.bottom a logical value indicating whether the eigenvalues bar plot should be added

Value

mcoa returns a list of class 'mcoa' containing :

pseudoeig a numeric vector with the all pseudo eigenvalues
call the call-up order
nf a numeric value indicating the number of kept axes
SynVar a data frame with the synthetic scores
axis a data frame with the co-inertia axes
Tli a data frame with the co-inertia coordinates
Tl1 a data frame with the co-inertia normed scores
Tax a data frame with the inertia axes onto co-inertia axis
Tco a data frame with the column coordinates onto synthetic scores
TL a data frame with the factors for Tli Tl1
TC a data frame with the factors for Tco
T4 a data frame with the factors for Tax
lambda a data frame with the all eigenvalues (computed on the separate analyses)
cov2 a numeric vector with the all pseudo eigenvalues (synthetic analysis)

Author(s)

Daniel Chessel chessel@biomserv.univ-lyon1.fr
Anne B Dufour dufour@biomserv.univ-lyon1.fr

References

Chessel, D. and Hanafi, M. (1996) Analyses de la co-inertie de K nuages de points, Revue de Statistique Appliquée, 44, 35–60.

Examples

data(friday87)
w1 <- data.frame(scale(friday87$fau, scal = FALSE))
w2 <- ktab.data.frame(w1, friday87$fau.blo, tabnames = friday87$tab.names)
mcoa1 <- mcoa(w2, "lambda1", scan = FALSE)
mcoa1
summary(mcoa1)
plot(mcoa1)

[Package ade4 version 1.4-0 Index]