def _discretize(a):
  """Discretizes array values to class labels."""
  arr = np.asarray(a)
  index = np.argsort(arr)
  inverse_index = np.zeros(arr.size, dtype=np.intp)
  inverse_index[index] = np.arange(arr.size, dtype=np.intp)
  arr = arr[index]
  obs = np.r_[True, arr[1:] != arr[:-1]]
  return obs.cumsum()[inverse_index] - 1
def _discretize ( a ) : arr = np . asarray ( a ) index = np . argsort ( arr ) inverse_index = np . zeros ( arr . size , dtype = np . intp ) inverse_index [ index ] = np . arange ( arr . size , dtype = np . intp ) arr = arr [ index ] obs = np . r_ [ True , arr [ 1 : ] != arr [ : - 1 ] ] return obs . cumsum ( ) [ inverse_index ] - 1
Discretizes array values to class labels.