11 py3.py 文件源码

def plot(self):
        pl.figure(figsize = (8, 8))
        pl.plot(self.t,self.theta)
        pl.plot(self.t,self.theta, 'c')
        pl.ylim(-4, 4)
        pl.xlim(0, 10)
        pl.ylabel('$\\theta$ (radians)')
        pl.xlabel('time (yr)')
        pl.title('Hyperion $\\theta$ versus time')
        pl.text(4.1, 3.5, 'Elliptical orbit')