colinsert: Move a single column within a data.table

In ldemaz/rcropmod: Crop model simulations in R

Description

Move a single column within a data.table

Usage

colinsert(colname, newpos, DT)

Arguments

colname	Name or index of column to move
newpos	Column name to left of new location, or index of new location.
DT	data.table to operate on

Details

This is a wrapper function for data.table's setcolorder function, written to avoid having to change an entire vector of column names.

Value

data.table DT with column order changed by reference

Examples

DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert("c", "a", DT)
DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert(3, 1, DT)
DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert(4, 1, DT)
DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert(4, 3, DT)
DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert("d", "b", DT)
DT <- data.table(a = 1:10, b = 1:10, c = 11:20, d = 26:35)
colinsert("d", 3, DT)

ldemaz/rcropmod documentation built on Feb. 29, 2020, 10:17 p.m.