merge_dupUpdate: Merge table and update values for duplicate column

In bcgov/BCForestGroundSample: BC forest ground sample compilation

Description

This is an extended function for merge function by updating values for duplicate column for the first, second or both tables.

Usage

merge_dupUpdate(x, y, by, updateDup, ...)

## S4 method for signature 'data.table,data.table,character,logical'
merge_dupUpdate(x, y,
  by, updateDup, ...)

## S4 method for signature 'data.table,data.table,character,missing'
merge_dupUpdate(x, y,
  by, updateDup, ...)

Arguments

x	data.table, The first table for merging.
y	data.table, The second table for merging.
by	character, The key to merge two tables.
updateDup	logical, Specifies whether update duplicate column in merged table when its information is available in y table, which means update from the second table. If missing, the function takes TRUE.
...	see merge for rest of arguments.

Value

A merged table without duplicate columes. A warning message is given if the duplicate column has different values.

Author(s)

Yong Luo

See Also

merge

bcgov/BCForestGroundSample documentation built on May 25, 2019, 3:21 p.m.