def det(self): ''' Caluculate determinant. ''' dimension = self.dim() if dimension == [2,2]: v1 = self.rows[0] v2 = self.rows[1] a = v1.cols[0] b = v1.cols[1] c = v2.cols[0] d = v2.cols[1] return a*d-b*c elif dimension == [3,3]: row1 = self.rows[0] row2 = self.rows[1] row3 = self.rows[2] A = row1.cols[0] B = row1.cols[1] C = row1.cols[2] x = row2.cols[0] y = row2.cols[1] z = row2.cols[2] a = row3.cols[0] b = row3.cols[1] c = row3.cols[2] return A*y*c+B*z*a+C*x*b-A*z*b-B*x*c-C*y*a else:#TODO: Not work... _mat = self.decomp() reop = [] for i, col in enumerate(_mat): for j, ele in enumerate(col): if i == j: reop.append(ele) return ut.mac(reop)
def test_mac(self): ls = [1,2,3,4,5] res = ut.mac(ls) self.assertEqual(120, res)
