Python Zigzag a matrix for dct code example
Example: Python Zigzag a matrix for dct
np.concatenate([np.diagonal(a[::-1,:], i)[::(2*(i % 2)-1)] for i in range(1-a.shape[0], a.shape[0])])np.concatenate([np.diagonal(a[::-1,:], i)[::(2*(i % 2)-1)] for i in range(1-a.shape[0], a.shape[0])])