matlab length vector code example

Example 1: matlab length of array

% To get the size of an array, use 'size()'
A = [1, 2, 3, 4; 4, 5, 6, 7];
s = size(A); % [2, 4]

% You can pick a specific dimension
s = size(A, 2); % 4

Example 2: matlab matrix size

d = size(X) % Returns sizes of each dimension of array X in a vector d.

[m,n] = size(X) % Returns the size of matrix X in separate variables m and n.

m = size(X,dim) % Returns the size of the dimension of X specified by scalar dim.