R: Compute table margin

margin.table {base}

R Documentation

Compute table margin

For a contingency table in array form, compute the sum of table entries for a given index.

margin.table(x, margin=NULL)

`x`	an array
`margin`	index number (1 for rows, etc.)

This is really just apply(x, margin, sum) packaged up for newbies, except that if margin has length zero you get sum(x).

The relevant marginal table. The class of x is copied to the output table, except in the summation case.

Peter Dalgaard

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