PyQt中绘制折线图

在PyQt中，可以使用matplotlib库来绘制折线图。

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget
from matplotlib.figure import Figure
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
import numpy as np


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("Line plot example")
        layout = QVBoxLayout()
        self.widget = QWidget()
        self.widget.setLayout(layout)
        self.setCentralWidget(self.widget)

        self.figure = Figure()
        self.canvas = FigureCanvas(self.figure)
        layout.addWidget(self.canvas)
        self.axes = self.figure.add_subplot(111)

        # Generate random data
        x = np.linspace(0, 10, 100)
        y = np.sin(x)

        # Plot data
        self.axes.plot(x, y)

        # Set y axis range
        self.axes.set_ylim([-1, 1])  # 设置y轴的最小值为-1，最大值为1

        self.canvas.draw()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

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