code: def add_plot(x, y, xl, yl, fig, ax, LATEX=False, linestyle=None, **kwargs):
      
      if LATEX:
          xl_data = xl[1]  # NOQA
          yl_data = yl[1]
      else:
          xl_data = xl[0]  # NOQA
          yl_data = yl[0]
  
      for idx in range(len(y)):
          ax.plot(x, y[idx], label=yl_data[idx], linestyle=linestyle)
  
      ax.legend(loc='upper right')
      ax.set_ylim(auto=True)
docs: Add plots to an existing plot