[R] Multiple correspondence analysis

From: Bernardo Rangel Tura <tura_at_centroin.com.br>
Date: Sun, 13 Jan 2008 08:43:19 -0200

Hi R-people,

I try using mca (multiple correspondence analysis) in evocation data (data base feminino2.csv attach in this mail).

Well in this database have 4 evocations for each 120 persons.

If I use this script:



plot(mca(base,abbrev=T),rows = F)

Work, but result in a ugly plot, so I try extract levels with low frequency:


v<-table(factor(base$p1,levels=niveis))+ table(factor(base

n2<-niveis[v>=5] #where 5 is cutoff frequency



plot(mca(evoc.df,abbrev=T),rows = F)

Don't work and result in a error:

Error in svd(X) : infinite or missing values in 'x'

Where I worng? Anybody help me?

Thanks in advance

Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology

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