# Numerical output from mca, how?

From: Kent (kent.lofgren@edmeas.umu.se)
Date: Wed Nov 23 2005 - 10:22:38 MET

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You guys made the move to an R-environment while I was away. That's cool - I
know nothing about R but I am willing to learn.

BACKGROUND: I want to do a multiple correspondence analysis. I successfully
load the data from a text file (kent_test.tab), create the factors (mm) and
execute the mca (dudi.acm):

Select the number of axes: 2

This is the output in R-window:

[R output]

Duality diagramm

class: acm dudi

\$call: dudi.acm(df = mm)

\$nf: 2 axis-components saved

\$rank: 9

eigen values: 1 0.2017 0.1598 0.1416 0.1275 ...

vector length mode content

1 \$cw 24 numeric column weights

2 \$lw 201 numeric row weights

3 \$eig 9 numeric eigen values

data.frame nrow ncol content

1 \$tab 201 24 modified array

2 \$li 201 2 row coordinates

3 \$l1 201 2 row normed scores

4 \$co 24 2 column coordinates

5 \$c1 24 2 column normed scores

other elements: cr

[/R output]

QUESTION: How do I read/print the numerical output, for example the weights
or the eigenvalues?

print(\$cw), print(data.frame) or.?

I have read the R manuals and searched the web, including the ade-4, seqinr
and R mailing list archives.

Regards

//Kent L. (ph.d.)

Dept. of Educational Measurement, Umea University

Address: Umea Univ., BVM, SE-90187 Umea, SWEDEN

Telephone: +46 (0)90-786 95 26

Mobile: +46 (0)70-333 80 46

E-mail: kent.lofgren@edmeas.umu.se

URL: www.umu.se/edmeas/bologna/index_eng.html

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