How replicate eigen::matrix dynamically

Question

During calculating the distance matrix between two feature maps.

A:(M,1)
B:(N,1)

I want to repeat B columns to equal A rows.

It is simple in NumPy:

A = np.random,rand(100, 1)
B = np.random.rand(88, 1)
np.repeat(B, A.shape[0], axis=1)

But in c++ Eigen, not work for dynamically assigning repeated shapes.

MatrixXi A = MatrixXi::Random(100,1);
MatrixXi B = MatrixXi::Random(88,1);

B.replicate<int, 1, A.rows()>(); // This will cause failure

Answer 1

The correct way to achieve the same effect as the python's numpy version in C++ would be:

B.replicate<1, 100>(); 

The above will do the replication as you want.