def to_matrix_vector(transform):
    """Split an homogeneous transform into its matrix and vector components.
    The transformation must be represented in homogeneous coordinates.
    It is split into its linear transformation matrix and translation vector
    components.
    This function does not normalize the matrix. This means that for it to be
    the inverse of from_matrix_vector, transform[-1, -1] must equal 1, and
    transform[-1, :-1] must equal 0.
    Parameters
    ----------
    transform : numpy.ndarray
        Homogeneous transform matrix. Example: a (4, 4) transform representing
        linear transformation and translation in 3 dimensions.
    Returns
    -------
    matrix, vector : numpy.ndarray
        The matrix and vector components of the transform matrix.  For
        an (N, N) transform, matrix will be (N-1, N-1) and vector will be
        a 1D array of shape (N-1,).
    See Also
    --------
    from_matrix_vector
    """
    ndimin = transform.shape[0] - 1
    ndimout = transform.shape[1] - 1
    matrix = transform[0:ndimin, 0:ndimout]
    vector = transform[0:ndimin, ndimout]
    return matrix, vector