# numpy.diag_indices_from

numpy.diag_indices_from(arr)

  Return the indices to access the main diagonal of an n-dimensional array.

  See `diag_indices` for full details.

  Parameters:
    arr array, at least 2-D

  See also

  `diag_indices`

  Notes

  New in version 1.4.0.

  Examples

  Create a 4 by 4 array.

      >>> a = np.arange(16).reshape(4, 4)
      >>> a
      array([[ 0,  1,  2,  3],
             [ 4,  5,  6,  7],
             [ 8,  9, 10, 11],
             [12, 13, 14, 15]])

  Get the indices of the diagonal elements.

      >>> di = np.diag_indices_from(a)
      >>> di
      (array([0, 1, 2, 3]), array([0, 1, 2, 3]))

      >>> a[di]
      array([ 0,  5, 10, 15])

  This is simply syntactic sugar for diag_indices.

      >>> np.diag_indices(a.shape[0])
      (array([0, 1, 2, 3]), array([0, 1, 2, 3]))