def graph(request, r=None, vec_Vdisco=None):

    print r
    print vec_Vdisco


    x, y, yerr = read_dat()
    fig = plt.figure()

    ax = fig.add_subplot(111)
    ax.set_yscale('log')
    ax.errorbar(x, y, yerr=e, fmt='ro', label='Pontos')
    ax.set_xlim(0.0, 1.6)
    ax.set_ylim(1, 1000)

    ax.grid(True)

    if vec_Vdisco:
        ax.plot(r, vec_Vdisco, 'go-')

    leg = ax.legend(loc=(0.63, .05), shadow=None)
    label_x = ax.set_xlabel('r (kpc)')
    label_y = ax.set_ylabel('V (km/s)')

    # set the xticks manually
    #ax.set_xticks([0,2,4,6,8,10,12,14])
    #ax.set_xticklabels([str(x) for x in range(0,15)])
    #ax.set_yticks(np.arange(0,1005,10,100))

    setp(ax.get_xticklabels(), fontsize=8.5)
    setp(ax.get_yticklabels(), fontsize=8.5)
    frame = leg.get_frame()
    frame.set_facecolor('white') # set the frame face color to white


    # matplotlib.text.Text instances
    for t in leg.get_texts():
        t.set_fontsize('9')
    return fig