def plot_origin(self):  
import matplotlib.cm as cm<EOL>import matplotlib.pyplot as plt<EOL>ax = plt.subplot(<NUM_LIT>)<EOL>xlim = [self._dx.min(), self._dx.max()]<EOL>ylim = [self._dy.min(), self._dy.max()]<EOL>for x, y in zip(self._dx, self._dy):<EOL><INDENT>xs = [<NUM_LIT:0>, x]<EOL>ys = [<NUM_LIT:0>, y]<EOL>plt.plot(xs, ys, '<STR_LIT>')  <EOL><DEDENT>plt.axis('<STR_LIT>')<EOL>plt.xlim(xlim)<EOL>plt.ylim(ylim)<EOL>
Plot vectors of positional transition of LISA values starting
from the same origin.