Python Matplotlib : Just the graph image

Question

我无法获取pyplot产生“裁剪”图像，即去掉灰色的左右边框，事实上，它并不是声音波形的准确表示:该声音文件前后没有静音。

我的代码:

import gtk

from matplotlib.figure import Figure
from numpy import arange, sin, pi
import scipy.io.wavfile as wavfile

from matplotlib.backends.backend_gtkagg import FigureCanvasGTKAgg as FigureCanvas

    win = gtk.Window()
    win.connect("destroy", lambda x: gtk.main_quit())
    win.set_default_size(400,300)
    win.set_title("Cropping figure")

    rate, data = wavfile.read(open('/home/px/gare_du_nord-catchlak.wav', 'r'))
    f = Figure()
    a = f.add_subplot(111, axisbg=(0.1843, 0.3098, 0.3098))
    a.plot(range(len(data)),data, color="OrangeRed",  linewidth=0.5, linestyle="-")
    a.axis('off')
    a.autoscale_view('tight')
    canvas = FigureCanvas(f)  # a gtk.DrawingArea

    win.add(canvas)

    win.show_all()
    gtk.main()

Answer 1

好的，我得到了my answer :

f.subplots_adjust(0, 0, 1, 1)

编辑:

这也有效，事实上它甚至更好:

a.margins(0, 0)