gstreamer/tests/plot-data

#!/usr/bin/env python

from __future__ import division

import pylab
import optparse
import sys

def read_line(fd):
    l = fd.readline()
    if not l:
        return None
    l = l.strip()
    if l[0] == ';':
        return read_line(fd)
    return [float(x) for x in filter(None, l.split(' '))]

def read_data(fd):
    data = []
    l = read_line(fd)
    while l:
        data.append(l)
        l = read_line(fd)
    return data

def make_xticks(start, end, numticks):
    return range(int(start), int(end), int((start-end)/numticks))

def make_plot(title):
    l = sys.stdin.readline()
    labels = l.strip().split(';')
    data = read_data(sys.stdin)

    domain = [x[0] for x in data]
    for i in range(1,len(labels)):
        pylab.plot(domain, [x[i] for x in data], label=labels[i])
    pylab.legend()
    pylab.ylabel(r'Clock time (s)')
    pylab.xlabel(r'Real time (s)')
    pylab.title(title)
    pylab.grid(True)
    pylab.show()
    
def main(args):
    parser = optparse.OptionParser()

    title = ' '.join(args[1:])
    make_plot(title)

main(sys.argv)