R: Express table entries as fraction of marginal table

prop.table {base}

R Documentation

Express table entries as fraction of marginal table

This is really sweep(x, margin, margin.table(x, margin), "/") for newbies, except that if margin has length zero, then one gets x/sum(x).

prop.table(x, margin=NULL)

`x`	table
`margin`	index, or vector of indices to generate margin for

Table like x expressed relative to margin

Peter Dalgaard

m <- matrix(1:4,2)
m
prop.table(m,1)