Select: Selector Functions for Character Vectors

In mlr3torch: Deep Learning with 'mlr3'

Selector Functions for Character Vectors

Description

A Select function subsets a character vector. They are used by the callback CallbackSetUnfreeze to select parameters to freeze or unfreeze during training.

Usage

select_all()

select_none()

select_grep(pattern, ignore.case = FALSE, perl = FALSE, fixed = FALSE)

select_name(param_names, assert_present = TRUE)

select_invert(select)

Arguments

pattern	See grep()
ignore.case	See grep()
perl	See grep()
fixed	See grep()
param_names	The names of the parameters that you want to select
assert_present	Whether to check that param_names is a subset of the full vector of names
select	A Select

Functions

• select_all(): select_all selects all elements

• select_none(): select_none selects no elements

• select_grep(): select_grep selects elements with names matching a regular expression

• select_name(): select_name selects elements with names matching the given names

• select_invert(): select_invert selects the elements NOT selected by the given selector

Examples

select_all()(c("a", "b"))
select_none()(c("a", "b"))
select_grep("b$")(c("ab", "ac"))
select_name("a")(c("a", "b"))
select_invert(select_all())(c("a", "b"))

mlr3torch documentation built on Aug. 26, 2025, 5:09 p.m.