pyqt figure大小

你可以使用 PyQt 中的 FigureCanvasQTAgg 作为 Matplotlib 图形的嵌入式画布。要设置 Figure 的大小，你可以在创建 Figure 对象时传入 figsize 参数。例如，以下代码创建了一个大小为 6x4 英寸的 Figure：

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

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

        # Create a Figure object with figsize=(6, 4)
        fig = Figure(figsize=(6, 4))

        # Add a subplot to the Figure
        ax = fig.add_subplot(111)

        # Plot some data on the Axes
        ax.plot([1, 2, 3], [4, 5, 6])

        # Create a canvas for the Figure
        canvas = FigureCanvas(fig)

        # Set the canvas as the central widget of the main window
        self.setCentralWidget(canvas)

# Create a PyQt application instance
app = QApplication(sys.argv)

# Create the main window
main_window = MainWindow()

# Show the main window
main_window.show()

# Run the event loop
sys.exit(app.exec_())

你可以根据自己的需要调整 figsize 的大小。