
import matplotlib.pyplot as plt 
import numpy as np
# import matplotlib.pyplot as plt


# plt .plot([3,1,4,5,2])
# plt.ylabel("grade")
# plt.show()


# plt.plot([3,1,4,5,2])
# plt.ylabel("Grade")
# plt.savefig("test", dpi=600)
# plt.show()


# plt.plot([0,2,4,6,8],[3,1,4,5,2])
# plt.ylabel("Grade")
# plt.axis([-1,10,0,6])
# plt.show()


# def f(t):
# 	return np.exp(-t) * np.cos(2*np.pi*t)


# a = np.arange(0.0,5.0, 0.02)

# plt.subplot(211)
# plt.plot(a,f(a))

# plt.subplot(2,1,2)
# plt.plot(a, np.cos(2*np.pi*t), "r--")
# plt.show()


