optiRum (version 0.35)

CJ.dt: Cross join two data.tables

Description

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.

Usage

CJ.dt(X, Y)

Arguments

X

A data.table

Y

A data.table

Value

• dt A data.table

See Also

Other helper: convertToXML; generatePDF; sanitise; 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)