tidytable (version 0.7.0)

left_join.: 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?

Value

A data.table

Examples

# NOT RUN {
df1 <- data.table(x = c("a", "a", "b"), y = 1:3)
df2 <- data.table(x = c("a", "b"), z = 1:2)

df1 %>% left_join.(df2)
df1 %>% inner_join.(df2)
df1 %>% right_join.(df2)
df1 %>% full_join.(df2)
df1 %>% anti_join.(df2)
# }