code: def twoDimensionalHistogram(title, title_x, title_y,
                              z, bins_x, bins_y,
                              lim_x=None, lim_y=None,
                              vmin=None, vmax=None):
      
      plt.figure()
  
      mesh_x, mesh_y = np.meshgrid(bins_x, bins_y)
  
      if vmin != None and vmin == vmax:
          plt.pcolor(mesh_x, mesh_y, z)
      else:
          plt.pcolor(mesh_x, mesh_y, z, vmin=vmin, vmax=vmax)
      plt.xlabel(title_x)
      plt.ylabel(title_y)
      plt.title(title)
      plt.colorbar()
  
      if lim_x:
          plt.xlim(lim_x[0], lim_x[1])
      if lim_y:
          plt.ylim(lim_y[0], lim_y[1])
docs: Create a two-dimension histogram plot or binned map.
  
      If using the outputs of np.histogram2d, remember to transpose the histogram.
  
      INPUTS