code: def plot(self):
          
          figure()
          plot_envelope(self.M, self.C, self.xplot)
          for i in range(3):
              f = Realization(self.M, self.C)
              plot(self.xplot,f(self.xplot))
  
          plot(self.abundance, self.frye, 'k.', markersize=4)
          xlabel('Female abundance')
          ylabel('Frye density')
          title(self.name)
          axis('tight')
docs: Plot posterior from simple nonstochetric regression.