On Aug 18, 2011; Daniel Malter wrote: > Pooling nominal with numeric variables and running pca on them sounds like > conceptual > nonsense to me.
Hi Daniel, This is not true. There are methods that are specifically designed to do a PCA-type analysis on mixed categorical and continuous variables, viz dudi.mix and dudi.hillsmith in package ade4. De Leeuw's homals method takes this a step further, doing amongst other things, a non-linear version of PCA using any type of variable. Regards, Mark. ----- Mark Difford (Ph.D.) Research Associate Botany Department Nelson Mandela Metropolitan University Port Elizabeth, South Africa -- View this message in context: http://r.789695.n4.nabble.com/How-to-use-PC1-of-PCA-and-dim1-of-MCA-as-a-predictor-in-logistic-regression-model-for-data-reduction-tp3750251p3752516.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
