Modify a data table by reference, with a log

These functions are the data.table set*() functions. They still change their input by reference and return exactly what data.table returns; they only report what they changed.

Usage

setnames(x, ...)

setcolorder(x, ...)

setkey(x, ...)

setkeyv(x, ...)

setorder(x, ...)

setorderv(x, ...)

setindex(x, ...)

setindexv(x, ...)

set(x, ...)

setDT(x, ...)

setDF(x, ...)

setattr(x, ...)

Arguments

x

The data table (or, for setDT(), the object to convert).

...

All other arguments, passed on unchanged.

Value

Whatever the corresponding data.table function returns.

Examples

dt <- data.table::data.table(a = 3:1, b = 1:3)
data.table::setnames(dt, "a", "alpha")
data.table::setkey(dt, alpha)