#!/usr/bin/python
#-*-coding:utf8-*-
from sys import argv
from pylab import *

if __name__ == "__main__":
    if len(argv) != 2:
        print "Usage: python", argv[0], " matrix.dat"
        exit (0)  


f = open ( argv[1] , 'r')
A = [ map(float,line.split()) for line in f ]

figure(1)
imshow(A, interpolation='nearest')
grid(True)
show()