code: def display_variogram_model(self):
          
          fig = plt.figure()
          ax = fig.add_subplot(111)
          ax.plot(self.lags, self.semivariance, 'r*')
          ax.plot(self.lags,
                  self.variogram_function(self.variogram_model_parameters,
                                          self.lags), 'k-')
          plt.show()
docs: Displays variogram model with the actual binned data.