cdf-gen.py
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			#!/usr/bin/python

			# I don't think this works if columns are of different sizes
			#and smaller columns are in between larger ones

			import sys
			import string
			import os

			if len(sys.argv)!=3:
			print "Usage: ./cdf-gen.py INUPT_FILENAME COLUMN_NR_STARTING_FROM_0"
			exit(1)

			filename = sys.argv[1]
			column = int(sys.argv[2])

			fd = open(filename, 'rb')

			responseTimes = []
			for line in fd.readlines():
			if len(line.strip()):
			try:
			responseTimes.append(float(string.split(line)[column]))
			except :
			print >> sys.stderr,"cdf-gen.py error reading ",filename," at line: ",len(responseTimes)

			responseTimes.sort()

			total_traffic=0
			for time in responseTimes:
			total_traffic += time

			prob = 0
			for time in responseTimes:
			prob += 1.0 / len(responseTimes)
			# prob += time *1.0 / total_traffic
			print "%.4f\t%.4f" % (prob*100, time)

R3704/scripts/cdf-gen.py47220741e6damaster