code: def display(self, xaxis, alpha, new=True):
          
          if new:
              figure()
          if self.ndim == 1:
              if self.mass > 0.:
                  x = concatenate((xaxis, xaxis[::-1]))
                  y = concatenate((self.lo, self.hi[::-1]))
                  fill(
                      x,
                      y,
                      facecolor='%f' % self.mass,
                      alpha=alpha,
                      label=(
                          'centered CI ' + str(
                              self.mass)))
              else:
                  pyplot(
                      xaxis,
                      self.value,
                      'k-',
                      alpha=alpha,
                      label=(
                          'median'))
          else:
              if self.mass > 0.:
                  subplot(1, 2, 1)
                  contourf(xaxis[0], xaxis[1], self.lo, cmap=cm.bone)
                  colorbar()
                  subplot(1, 2, 2)
                  contourf(xaxis[0], xaxis[1], self.hi, cmap=cm.bone)
                  colorbar()
              else:
                  contourf(xaxis[0], xaxis[1], self.value, cmap=cm.bone)
                  colorbar()
docs: E.display(xaxis, alpha = .8)
  
          :Arguments: xaxis, alpha
  
          Plots the CI region on the current figure, with respect to
          xaxis, at opacity alpha.
  
          :Note: The fill color of the envelope will be self.mass
              on the grayscale.