d = size(X) returns the sizes of each dimension of array X in a vector d with ndims(X) elements. If X is a scalar, which MATLAB software regards as a 1-by-1 array, size(X) returns the vector [1 1].
Example
>> a = [1 2 3 4 5 6 7] a = 1 2 3 4 5 6 7 >> size(a) ans = 1 7