Non symmetric correspondence analysis
performs a non symmetric correspondence analysis.
dudi.nsc(df, scannf = TRUE, nf = 2)
df |
a data frame containing positive or null values |
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 |
Returns a list of class nsc and dudi (see dudi) containing also
N |
sum of the values of the initial table |
Daniel Chessel
Anne-Béatrice Dufour anne-beatrice.dufour@univ-lyon1.fr
Kroonenberg, P. M., and Lombardo R. (1999) Nonsymmetric correspondence analysis: a tool for analysing contingency tables with a dependence structure. Multivariate Behavioral Research, 34, 367–396.
data(housetasks)
nsc1 <- dudi.nsc(housetasks, scan = FALSE)
if(adegraphicsLoaded()) {
g1 <- s.label(nsc1$c1, plab.cex = 1.25)
g2 <- s.arrow(nsc1$li, add = TRUE, plab.cex = 0.75)
} else {
s.label(nsc1$c1, clab = 1.25)
s.arrow(nsc1$li, add.pl = TRUE, clab = 0.75) # see ref p.383
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.