Hello, I am having an error with the first exercise in the course of Math for ML (C1_W4). I defined the the vectors like follow but I am having an error:

Define transformation matrix A_reflection_yaxis as a numpy array.

A_reflection_yaxis = np.array([[-2,-3], [2,1]])

Find eigenvalues and eigenvectors or matrix A_reflection_yaxis.

Hello Alex_Eponon
Here He asked You the reflection of y_{axis}
and he didn’t asked to apply matrix multiplication
so here your matrix after multiplication = \begin{bmatrix} -2 && -3 \\ 2 && 1 \end{bmatrix}
He didn’t asked you to do this, he asked just for reflection of y_axis
I wish It helped
Dear Atef,

Hi, I have fixed it. The matrix A_reflection_yaxis has nothing to do with the matrix A. Imagine y-axis as a mirror and A_reflection_yaxis is the reflection of the usual basis vectors np.array([[1,0],[0,1]]) using y-axis. Good luck!