import numpy
from matplotlib.pyplot import *

def traceForce(fichier,duree_tour):
    diametre = 48.5
    vitesse = numpy.pi*diametre/duree_tour
    [t,F] = numpy.loadtxt(fichier)
    figure(figsize=(8,5))
    plot(t,F) 
    xlabel("t (s)")
    ylabel("F (N)")
    title("v = %f mm/s"%vitesse)
    grid()
    
             

traceForce("force-82.txt",15.0)
             

traceForce("force-83.txt",10.0)
             

traceForce("force-85.txt",7.0)
             

traceForce("force-86.txt",5.0)
             

traceForce("force-87.txt",3.0)
             

traceForce("force-88.txt",2.0)
             

traceForce("force-68.txt",15)
             

traceForce("force-69.txt",10)
             

traceForce("force-70.txt",7)
             

traceForce("force-71.txt",5)
             

traceForce("force-72.txt",3)
             

traceForce("force-90.txt",15)
             

axis([0,5,-0.1,0.5])
             

traceForce("force-91.txt",10)
             

traceForce("force-92.txt",7)
             

traceForce("force-93.txt",5)
             

traceForce("force-94.txt",3)
             

traceForce("force-95.txt",2)