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Return all factor variables in a dataframe or matrix
list.factor(x, levels = FALSE)
a dataframe or matrix
logical. TRUE to display levels for factor variable.
factor variable names and levels
# NOT RUN { jh=data.frame(x=c(1,2,3,1), k=c(4,5,6,7), h=c('a','a','b','b')) list.factor(jh) # }
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