Returns conditional proportions given
margins, i.e. entries of
x, divided by the appropriate marginal sums.
proportions(x, margin = NULL) prop.table(x, margin = NULL)
a vector giving the margins to split by.
E.g., for a matrix
x expressed relative to
prop.table is an earlier name, retained for back-compatibility.
sweep are a more general mechanism for sweeping out marginal statistics.
m <- matrix(1:4, 2) m proportions(m, 1) DF <- as.data.frame(UCBAdmissions) tbl <- xtabs(Freq ~ Gender + Admit, DF) proportions(tbl, "Gender")
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