This is machine translation

Translated by Microsoft
Mouse over text to see original. Click the button below to return to the English verison of the page.


Number of array dimensions




N = ndims(A) returns the number of dimensions in the array A. The number of dimensions is always greater than or equal to 2. The function ignores trailing singleton dimensions, for which size(A,dim) = 1.


collapse all

Find Dimensions of Vector

Create a row vector.

A = 1:5;

Find the number of dimensions in the vector.

ans =


The result is 2 because the vector has a size of 1-by-5.

Find Dimensions of Cell Array

Create a cell array of strings.

A{1,1,1} = 'cell_1';
A{1,1,2} = 'cell_2';
A{1,1,3} = 'cell_3'
A(:,:,1) = 


A(:,:,2) = 


A(:,:,3) = 


Find the number of dimensions of the cell array.

ans =


The result is 3 because the cell array has a size of 1-by-1-by-3.

Input Arguments

collapse all

A — Input arrayscalar | vector | matrix | multidimensional array

Input array, specified as a scalar, vector, matrix, or multidimensional array. This includes numeric arrays, logical arrays, character arrays, categorical arrays, datetime arrays, duration arrays, calendarDuration arrays, tables, structure arrays, cell arrays, and object arrays.

More About

collapse all


The number of dimensions in an array is the same as the length of the size vector of the array. In other words, ndims(A) = length(size(A)).

See Also


Introduced before R2006a

Was this topic helpful?