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.


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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.

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


C(:,:,2) = 


C(:,:,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

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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

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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


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