chunk_vector {mlr3misc}

Chunk Vectors

Description

Chunk atomic vectors into parts of roughly equal size. chunk() takes a vector length n and returns an integer with chunk numbers. chunk_vector() uses base::split() and chunk() to split an atomic vector into chunks.

Usage

chunk_vector(x, n_chunks = NULL, chunk_size = NULL, shuffle = TRUE)

chunk(n, n_chunks = NULL, chunk_size = NULL, shuffle = TRUE)

Arguments

x

(vector())
Vector to split into chunks.

n_chunks

(integer(1))
Requested number of chunks. Mutually exclusive with chunk_size and props.

chunk_size

(integer(1))
Requested number of elements in each chunk. Mutually exclusive with n_chunks and props.

shuffle

(logical(1))
If TRUE, permutes the order of x before chunking.

n

(integer(1))
Length of vector to split.

Value

chunk() returns a integer() of chunk indices, chunk_vector() a list() of integer vectors.

Examples

x = 1:11

ch = chunk(length(x), n_chunks = 2)
table(ch)
split(x, ch)

chunk_vector(x, n_chunks = 2)

chunk_vector(x, n_chunks = 3, shuffle = TRUE)