# scipy.linalg.triu

scipy.linalg.triu(m, k=0)

  Deprecated since version 1.11.0: `tril` is deprecated in favour of `numpy.triu` and will be removed in SciPy 1.13.0.

  Make a copy of a matrix with elements below the kth diagonal zeroed.

  Parameters:
    m array_like

      Matrix whose elements to return

    k int, optional

      Diagonal below which to zero elements. k == 0 is the main diagonal, k < 0 subdiagonal and k > 0 superdiagonal.

  Returns:
    triu ndarray

      Return matrix with zeroed elements below the kth diagonal and has same shape and type as m.

  Examples

      >>> from scipy.linalg import triu
      >>> triu([[1,2,3],[4,5,6],[7,8,9],[10,11,12]], -1)
      array([[ 1,  2,  3],
             [ 4,  5,  6],
             [ 0,  8,  9],
             [ 0,  0, 12]])