| margin.table {base} | R Documentation |
Compute table margin
Description
For a contingency table in array form, compute the sum of table entries for a given index.
Usage
margin.table(x, margin=NULL)
Arguments
x |
an array |
margin |
index number (1 for rows, etc.) |
Details
This is really just apply(x, margin, sum) packaged up for
newbies, except that if margin has length zero you get
sum(x).
Value
The relevant marginal table. The class of x is copied to the
output table, except in the summation case.
Author(s)
Peter Dalgaard
Examples
m<-matrix(1:4,2)
margin.table(m,1)
margin.table(m,2)