code: def find_bar_plot(ar, nth):
      "Find the NTH barplot of the cluster in area AR."
      for plot in ar.plots():
          if isinstance(plot, T) and plot.cluster[0] == nth:
              return plot
      raise Exception("The %dth bar plot in the cluster not found." % nthf find_bar_plot(ar, nth):
      "Find the NTH barplot of the cluster in area AR."
      for plot in ar.plots():
          if isinstance(plot, T) and plot.cluster[0] == nth:
              return plot
      raise Exception("The %dth bar plot in the cluster not found." % nth)
docs: Find the NTH barplot of the cluster in area AR.