饼图中的matplotlib mouseclick事件 [英] matplotlib mouseclick event in pie chart
本文介绍了饼图中的matplotlib mouseclick事件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在matplotlib和Python中是否有一种方法可以返回在饼图中单击的值/标签.例如,如果用户单击饼形图的条形图A,则返回值A.如果用户单击B饼形图的条形图B,则返回值B.
解决方案
from matplotlib import pyplot as plt
# make a square figure and axes
plt.figure(figsize=(6,6))
ax = plt.axes([0.1, 0.1, 0.8, 0.8])
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
fracs = [15,30,45, 10]
explode=(0, 0.05, 0, 0)
p = plt.pie(fracs, explode=explode, labels=labels, autopct='%1.1f%%', shadow=True)
plt.title('Raining Hogs and Dogs', bbox={'facecolor':'0.8', 'pad':5})
w = p[0][0]
plt.show()
class PieEventHandler:
def __init__(self,p):
self.p = p
self.fig = p[0].figure
self.ax = p[0].axes
self.fig.canvas.mpl_connect('button_press_event', self.onpress)
def onpress(self, event):
if event.inaxes!=self.ax:
return
for w in self.p:
(hit,_) = w.contains(event)
if hit:
print w.get_label()
handler = PieEventHandler(p[0])
参考:
http://matplotlib.org/examples/pylab_examples/pie_demo.html
Is there a way in matplotlib and Python to return the value/label clicked in a pie chart. For example if user clicks on sliver A of pie chart, return value A. If user clicks on sliver B of B pie chart, return value B.
解决方案
from matplotlib import pyplot as plt
# make a square figure and axes
plt.figure(figsize=(6,6))
ax = plt.axes([0.1, 0.1, 0.8, 0.8])
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
fracs = [15,30,45, 10]
explode=(0, 0.05, 0, 0)
p = plt.pie(fracs, explode=explode, labels=labels, autopct='%1.1f%%', shadow=True)
plt.title('Raining Hogs and Dogs', bbox={'facecolor':'0.8', 'pad':5})
w = p[0][0]
plt.show()
class PieEventHandler:
def __init__(self,p):
self.p = p
self.fig = p[0].figure
self.ax = p[0].axes
self.fig.canvas.mpl_connect('button_press_event', self.onpress)
def onpress(self, event):
if event.inaxes!=self.ax:
return
for w in self.p:
(hit,_) = w.contains(event)
if hit:
print w.get_label()
handler = PieEventHandler(p[0])
references:
Color values in imshow for matplotlib?
http://matplotlib.org/examples/pylab_examples/pie_demo.html
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