pyqt5でmatplotlibを使いたいけどグラフが表示されない

###前提・実現したいこと
python3.5を使っています。pyqt5でmatplotlibを使いたいです。しかし、コードを書いてみたところ、ボタンは表示されるのにグラフが表示されません。

###該当のソースコード

python3.5
1import sys
2from PyQt5 import QtWidgets
3 
4from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
5from matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbar
6import matplotlib.pyplot as plt
7 
8import random
9 
10class Window(QtWidgets.QDialog):
11    def __init__(self, parent=None):
12        super().__init__(parent)
13
14        self.setWindowTitle("グラフ")
15        self.setGeometry(300,300,500,500)
16        
17        self.figure = plt.figure()
18        self.axes = self.figure.add_subplot(111)
19        # We want the axes cleared every time plot() is called
20        self.axes.hold(False)
21        self.canvas = FigureCanvas(self.figure)
22        self.canvas.move(0,0)
23 
24         
25        self.toolbar = NavigationToolbar(self.canvas, self)
26        self.toolbar.hide()
27 
28        # Just some button 
29        self.button1 = QtWidgets.QPushButton('Plot',self)
30        self.button1.clicked.connect(self.plot)
31        self.button1.move(0,400)
32 
33        self.button2 = QtWidgets.QPushButton('Zoom',self)
34        self.button2.clicked.connect(self.zoom)
35        self.button2.move(100,400)
36         
37        self.button3 = QtWidgets.QPushButton('Pan',self)
38        self.button3.clicked.connect(self.pan)
39        self.button3.move(200,400)
40         
41        self.button4 = QtWidgets.QPushButton('Home',self)
42        self.button4.clicked.connect(self.home)
43        self.button4.move(300,400)
44 
45
46 
47    def home(self):
48        self.toolbar.home()
49    def zoom(self):
50        self.toolbar.zoom()
51    def pan(self):
52        self.toolbar.pan()
53         
54    def plot(self):
55        ''' plot some random stuff '''
56        data = [random.random() for i in range(25)]
57        self.axes.plot(data, '*-')
58        self.canvas.draw()
59 
60if __name__ == '__main__':
61    app = QtWidgets.QApplication(sys.argv)
62 
63    main = Window()
64    main.setWindowTitle('Simple QTpy and MatplotLib example with Zoom/Pan')
65    main.show()
66 
67    sys.exit(app.exec_())

行動規範の内容に同意します

回答1件

自己解決

レイアウトを使わない方法ではこれで書けました。

python3.5
1import sys
2from PyQt5 import QtWidgets
3
4from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
5from matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbar
6import matplotlib.pyplot as plt
7
8import random
9
10class Window(QtWidgets.QDialog):
11    def __init__(self, parent=None):
12        super().__init__(parent)
13
14        self.setWindowTitle("グラフ")
15        self.setGeometry(300,300,500,500)
16
17        self.figure = plt.figure()
18        self.axes = self.figure.add_subplot(111)
19        # We want the axes cleared every time plot() is called
20        self.axes.hold(False)
21        self.canvas = FigureCanvas(self.figure)
22        self.canvas.setParent(self)
23
24        self.canvas.move(100,20)
25
26
27        self.toolbar = NavigationToolbar(self.canvas, self)
28        self.toolbar.hide()
29
30        # Just some button 
31        self.button1 = QtWidgets.QPushButton('Plot',self)
32        self.button1.clicked.connect(self.plot)
33        self.button1.move(0,400)
34
35    def plot(self):
36        ''' plot some random stuff '''
37        data = [random.random() for i in range(25)]
38        self.axes.plot(data, '*-')
39        self.canvas.draw()
40
41if __name__ == '__main__':
42    app = QtWidgets.QApplication(sys.argv)
43
44    main = Window()
45    main.setWindowTitle('Simple QTpy and MatplotLib example with Zoom/Pan')
46    main.show()
47
48    sys.exit(app.exec_())
49