code: def plot(self):
          
          if self.results_table == None:
              return "no results found"
          else:
              bb = self.results_table.sort_values(
                  by=["ABCD", "ACBD"], 
                  ascending=[False, True],
                  )
  
              ## make a barplot
              import toyplot
              c = toyplot.Canvas(width=600, height=200)
              a = c.cartesian()
              m = a.bars(bb)
              return c, a, m
docs: return a toyplot barplot of the results table.