size

Sizes along all dimensions, or along one specific dimension.

Syntax

sz       = size(X)
n        = size(X, dim)

Description

With one argument, returns a row vector containing the size of X along each of its dimensions — first element is the row count, second is the column count, etc.

With two arguments, returns the size along the dimension dim only. dim is 1-based; passing a dim larger than ndims(X) raises an error.

Examples

size(zeros(3,5))       % [3 5]
size(zeros(3,5,2), 3)  % 2
size([1 2 3 4])        % [1 4]

See also

• length — Length of the longest dimension.
• numel — Total number of elements.
• ndims — Number of dimensions of the input.
• size_equal — Test whether all inputs share the same shape.