ndim: Get the Number of Dimensions of an Array

In broadcast: Broadcasted Array Operations Like 'NumPy'

Get the Number of Dimensions of an Array

Description

ndim() returns the number of dimensions of an object.
lst.ndim() returns the number of dimensions of every list-element.

Usage

ndim(x)

lst.ndim(x)

Arguments

x	a vector or array (for ndim()), or a list of vectors/arrays (for lst.ndim()).

Value

For ndim(): an integer scalar.
For lst.ndim(): an integer vector, with the same length, names and dimensions as x.

Examples

x <- array(1:24, 2:4)
ndim(x)

x <- list(
  array(1:10, 10),
  array(1:10, c(2, 5)),
  array(c(letters, NA), c(3,3,3))
)
lst.ndim(x)

x <- list(
  1:10,
  array(1:10, 10),
  matrix(1:10, 2, 5),
  array(c(letters, NA), c(3,3,3))
)
dim(x) <- c(2,2)
dimnames(x) <- list(c("a", "b"), c("x", "y"))
lst.ndim(x)

broadcast documentation built on Aug. 20, 2026, 9:08 a.m.