Cross join two data.tables

Source: R/CJ.dt.R

The package data.table has a CJ() function which produces a data.table out of two vectors. This function does the Cartesian product of two data.tables instead.

CJ.dt(X, Y)

Arguments

X

A data.table
Y

A data.table

Value

dt A data.table

See also

Other helper: convertToXML, generatePDF, pounds_format, sanitise, thousands_format, wordwrap

Examples

library(data.table)
a  <- data.table(a=1:2, b=letters[1:2])
b  <- data.table(c=3:4, d=letters[3:4])
ab <- CJ.dt(a,b)