setprefix: setprefix
In decisionpatterns/data.table.plus: Extensions and Utilities for 'data.table'

set/change prefix on column names

1	setprefix(x, old, new)

`x`	data.table
`old`	string possibly a regex (there is no need to add "^")
`new`	string

setprefix works similar to setnames but works only on the beginning of names not the whole names by swapping out the beginning.

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x <-data.table( i.x=1:10, i.y=1:10 )
x %>% setprefix( "i.", "x." )
names(x)

decisionpatterns/data.table.plus documentation built on June 15, 2020, 10:26 p.m.

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