code: def _lowess_tricube(t):
      """
      The _tricube function applied to a numpy array.
      The tricube function is (1-abs(t)**3)**3.
  
      Parameters
      ----------
      t : ndarray
          Array the tricube function is applied to elementwise and
          in-place.
  
      Returns
      -------
      Nothing
      """
      # t = (1-np.abs(t)**3)**3
      t[:] = np.absolute(t)  # , out=t) #numpy version?
      _lowess_mycube(t)
      t[:] = np.negative(t)  # , out = t)
      t += 1
      _lowess_mycube(t)
  
file_path: statsmodels/statsmodels/nonparametric/smoothers_lowess_old.py
imports: import numpy
  from numpy.linalg import lstsq
label_desc: Use image node_id 6 for calling a global function with example usage: _lowess_tricube(t) without return types