>>> import numpy as np
>>> import matplotlib.pyplot as plt
>>> import matplotlib.mlab as mlab
>>> import matplotlib.cbook as cbook
>>> import matplotlib.ticker as ticker
>>> a=np.loadtxt('indegree.csv')
>>> fig=plt.figure()
>>> ax=fig.add_subplot(111)
>>> ax.plot(np.arange(len(a)),a)
[<matplotlib.lines.Line2D object at 0x1771c290>]
>>> plt.show()
