code: def plot_origin(self):  # TODO add attribute option to color vectors
          
          import matplotlib.cm as cm
          import matplotlib.pyplot as plt
          ax = plt.subplot(111)
          xlim = [self._dx.min(), self._dx.max()]
          ylim = [self._dy.min(), self._dy.max()]
          for x, y in zip(self._dx, self._dy):
              xs = [0, x]
              ys = [0, y]
              plt.plot(xs, ys, '-b')  # TODO change this to scale with attribute
          plt.axis('equal')
          plt.xlim(xlim)
          plt.ylim(ylim)
docs: Plot vectors of positional transition of LISA values starting
          from the same origin.