Posted by
news on
Jul 08, 2011; 2:12pm
URL: http://spssx-discussion.165.s1.nabble.com/PCA-for-dichotomous-data-tp4564908.html
Hello,
Eurobarometer 66.1 provides data on social values which I would like to
use, with other influences, to explain church going.
The item battery of social values provides 12 questions with yes/no
answer alternatives. The respondent can choose up to three variables.
What I need is a procedure like a PCA for dichotomous data, but I don't
have access to CATPCA. I calculated proximities with the dice algorithm
to correct for the high probability that none of two items will be
selected. I used PROXIMITIES to calculated the similarity of variables.
PROXIMITIES v327 to v338
/VIEW=VARIABLE
/MEASURE= dice (1,0) .
Once PROXIMITIES produces the matrix can you input this as a correlation
matrix into FACTOR ? And how to move from this variable-based analysis
back to the case-based analysis ?
Is there a better alternative for getting a variable structure from
dichotomous variables ?
TIA,
F. Thomas
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