#!/usr/bin/python
import sys
import csv
import numpy
import matplotlib.pyplot as plot

if len (sys.argv) < 2:
    print "Input filename missing"
    exit(-1)

data = list(csv.reader(open(sys.argv[1]), delimiter = ';'))
array = numpy.array(data).astype("float")
cpu = array[:, 0]
mem = array[:, 1]
fig, (a1, b1) = plot.subplots(2, 1)
b1.hist(numpy.round(cpu))
b1.set_title('CPU usage histogram')
a1.set_title('Memory & CPU usage')
a1.plot(mem, 'b--')
a1.set_ylabel('Memory usage', color='b')
a2 = a1.twinx()
a2.plot(cpu, 'r*')
a2.set_ylabel('CPU usage in %', color='r')

plot.show()