docs: def postproc(self, close=True, **kwargs):
          """
          Postprocess and visualize the data
  
          Parameters
          ----------
          close: bool
              Close the figure at the end
          ``**kwargs``
              Any other parameter for the
              :meth:`model_organization.ModelOrganizer.app_main` method
          """
          import matplotlib.pyplot as plt
          import seaborn as sns  # for nice plot styles
          self.app_main(**kwargs)
  
          # ---- load the data
          indata = np.loadtxt(self.exp_config['infile'])
          outdata = np.loadtxt(self.exp_config['output'])
          x_data = np.linspace(-np.pi, np.pi)
  
          # ---- make the plot
          fig = plt.figure()
          # plot input data
          plt.plot(x_data, indata, label='input')
          # plot output data
          plt.plot(x_data, outdata, label='squared')
          # draw a legend
          plt.legend()
          # use the description of the experiment as title
          plt.title(self.exp_config.get('description'))
  
          # ---- save the plot
          self.exp_config['plot'] = ofile = osp.join(self.exp_config['expdir'],
                                                     'plot.png')
          self.logger.info('Saving plot to %s', osp.relpath(ofile))
          fig.savefig(ofile)
  
          if close:
              plt.close(fig)