How to plot a graph using matplotlib in Eclipse

import numpy as np

import matplotlib.pyplot as plt

import pylab

# Come up with x and y

x = np.arange(0, 5, 0.1)

y = np.sin(x)

# Just print x and y for fun

print x

print y

# plot the x and y and you are supposed to see a sine curve

plt.plot(x, y)

# without the line below, the figure won't show

pylab.show()

from numpy import *

a = arange(15).reshape(3, 5)

print "The matrix a is \n"+str(a)

print "a[1,2] = " +str(a[1,2])

print "the matrix dimension is " + str(a.shape)

from matplotlib.pyplot import *

from pylab import *

matshow(a)

show()