left_join: Join two data.tables together

In tidytable: Tidy Interface to 'data.table'

Join two data.tables together

Description

Join two data.tables together

Usage

left_join(x, y, by = NULL, suffix = c(".x", ".y"), ..., keep = FALSE)

right_join(x, y, by = NULL, suffix = c(".x", ".y"), ..., keep = FALSE)

inner_join(x, y, by = NULL, suffix = c(".x", ".y"), ..., keep = FALSE)

full_join(x, y, by = NULL, suffix = c(".x", ".y"), ..., keep = FALSE)

anti_join(x, y, by = NULL)

semi_join(x, y, by = NULL)

Arguments

x	A data.frame or data.table
y	A data.frame or data.table
by	A character vector of variables to join by. If NULL, the default, the join will do a natural join, using all variables with common names across the two tables.
suffix	Append created for duplicated column names when using full_join()
...	Other parameters passed on to methods
keep	Should the join keys from both x and y be preserved in the output?

Examples

df1 <- data.table(x = c("a", "a", "b", "c"), y = 1:4)
df2 <- data.table(x = c("a", "b"), z = 5:6)

df1 %>% left_join(df2)
df1 %>% inner_join(df2)
df1 %>% right_join(df2)
df1 %>% full_join(df2)
df1 %>% anti_join(df2)

tidytable documentation built on Sept. 11, 2024, 8:05 p.m.