Matplotlib绘图窗口

Question

用matplotlib画图，会单独弹出绘图窗口，有没有办法让图表在主窗口显示而不弹出独立窗口

窗口的搭建用的是PyQt5，想把matplotlib的绘图结果直接在PyQt5搭建的图形界面里显示

Answer 1

matplotlib支持交互式绘图，这是我们最常使用的方式。此外，matplotlib也可以方便地嵌入到多个GUI库中，比如PyQt和wxPython等。

import numpy as np
import matplotlib
import matplotlib.pyplot as plt
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from PyQt5 import QtCore, QtWidgets,QtGui
import sys

matplotlib.use('Qt5Agg')


class My_Main_window(QtWidgets.QDialog):
    def __init__(self,parent=None):
        super(My_Main_window,self).__init__(parent)
        
        self.figure = plt.figure()
        self.canvas = FigureCanvas(self.figure)
        self.button_plot = QtWidgets.QPushButton("绘制")

        self.button_plot.clicked.connect(self.plot_)
        
        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(self.canvas)
        layout.addWidget(self.button_plot)
        self.setLayout(layout)

    def plot_(self):
        x = np.linspace(0, 2*np.pi, 200)
        y = np.sin(x)
        ax = self.figure.add_axes([0.1,0.1,0.8,0.8])
        ax.plot(x, y)
        self.canvas.draw()

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    main_window = My_Main_window()
    main_window.show()
    app.exec()