First, make a matrix whose each row contains the transpose of each of the given vector like:
A = [ v'; u1'; u2'; u3' ]
Then reduce matrix A to echlon form using rref function :
E = rref(A);
whose detailed information is there in the following link:
Then the vectors v, u1,u2 and u3 are linearly dependent if and only if E has a row of zeroes. You can refer to the following document for Linear Dependence Test of vectors:
