Join operations supporting S4 class objects

left_join(x, y, by)

# S3 method for DataFrame
left_join(x, y, by)

Arguments

x, y

DataFrame. Data frames, or objects, to be coerced into a single object.

by

character. Column names to use for merge operation. Note that this is always required, unlike the dplyr tbl_df method, where this is optional.

See also