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# numpy.triu

`numpy.``triu`(m, k=0)

  Upper triangle of an array.

  Return a copy of a matrix with the elements below the k-th diagonal zeroed.

  Please refer to the documentation for `tril` for further details.

  See also

  `tril`
    lower triangle of an array

  Examples

      >>> np.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]])