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Computes the Cramer's association coefficient between 2 nominal variables.
cramer(x, y)
a contingency table ('matrix' or 'table' object). x and y can also both be factors.
ignored if x is a contingency table. If not, y should be a vector of the same length.
Maxime HERVE <maxime.herve@univ-rennes1.fr>
var1 <- sample(LETTERS[1:3],30,replace=TRUE)
var2 <- sample(letters[1:3],30,replace=TRUE)
cramer(var1,var2)
# or cramer(table(var1,var2))
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