Non symmetric correspondence analysis
dudi.nsc.Rd
performs a non symmetric correspondence analysis.
Arguments
- 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
Value
Returns a list of class nsc
and dudi
(see dudi
) containing also
- N
sum of the values of the initial table
References
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.
Author
Daniel Chessel
Anne-Béatrice Dufour anne-beatrice.dufour@univ-lyon1.fr