我试图从Matplotlib运行演示代码:legend_picking example。Matplotlib演示代码不起作用
当代码被点击时,这段代码应该隐藏并显示绘图线。
看来,事件'pick_event'没有被激发,当我点击图例上的行。 我没有问题与simple picking example
"""
# Enable picking on the legend to toggle the legended line on and off
"""
import numpy as np
import matplotlib.pyplot as plt
t = np.arange(0.0, 0.2, 0.1)
y1 = 2*np.sin(2*np.pi*t)
y2 = 4*np.sin(2*np.pi*2*t)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_title('Click on legend line to toggle line on/off')
line1, = ax.plot(t, y1, lw=2, color='red', label='1 HZ')
line2, = ax.plot(t, y2, lw=2, color='blue', label='2 HZ')
leg = ax.legend(loc='upper left', fancybox=True, shadow=True)
leg.get_frame().set_alpha(0.4)
# we will set up a dict mapping legend line to orig line, and enable
# picking on the legend line
lines = [line1, line2]
lined = dict()
for legline, origline in zip(leg.get_lines(), lines):
legline.set_picker(5) # 5 pts tolerance
lined[legline] = origline
def onpick(event):
# on the pick event, find the orig line corresponding to the
# legend proxy line, and toggle the visibilit
legline = event.artist
origline = lined[legline]
vis = not origline.get_visible()
origline.set_visible(vis)
# Change the alpha on the line in the legend so we can see what lines
# have been toggled
if vis:
legline.set_alpha(1.0)
else:
legline.set_alpha(0.2)
fig.canvas.draw()
fig.canvas.mpl_connect('pick_event', onpick)
plt.show()
它是否给出任何错误消息?对我来说它起作用(Matplotlib 1.0.1)。 – joris
没有任何消息......当我直接点击图上的线条时,我能够触发一个事件处理程序。也许我没有很好地描绘传奇线和情节线之间的对应关系。我在VirtualBox的Mint Linux中运行它。 – tos