code: def _add_jitter(self, vec):
          
          if self.scatterchartdata.jitter == 0 or self.scatterchartdata.jitter is None:
              return vec
          return vec + np.random.rand(1, len(vec))[0] * self.scatterchartdata.jitter
docs: :param vec: array to jitter
          :return: array, jittered version of arrays