the question of 6.2 have some problem

[jsxyhelu]

/*2. Compact matrix and vector types:
a. Using the cv::Mat33f and cv::Vec3f objects (respectively), create a 3 × 3
matrix and 3-row vector.
b. Can you multiply them together directly? If not, why not?

chage cv::Mat33f into cv::Matx33f ?
as we dont have Mat33f in opencv3……