merge_dt: Merge two data.tables

In GL-Li/mytoolbox: A collection of functions and data that I often use in my daily work

Merge two data.tables

Description

Merge two data.tables to form a large data.table with all combination of rows. It is similar to base::merge(df1, df2).

Usage

merge_dt(dt1, dt2, id1 = FALSE, id2 = FALSE)

Arguments

dt1	first data.table
dt2	second data.table
id1, id2	add a id number for each row of dt1 or dt2 if TRUE. The purpose of adding id is for future "by" operation based on rows

Value

data.table, which has n1 x n2 rows where n1 and n2 are number of rows of dt1 and dt2

Examples

# make up two data tables

GL-Li/mytoolbox documentation built on May 16, 2024, 4:29 p.m.