MatplotlibをQtの画面で使う

Qtで作るGUI画面に、Matplotlibで描くグラフを埋め込む。
その方法の一例を以下に示す。ここではQt Designerは使わず、ただ画面に表示させるのみ。

import sys
from PyQt4 import QtGui
import numpy as np
from matplotlib.figure import Figure
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
class MyForm(FigureCanvas):
    def __init__(self):
        self.fig = Figure()
        self.lines = self.fig.add_subplot(111)
        self.x = np.arange(0.0, 3.0, 0.01)
        self.y1 = np.cos(2*np.pi*self.x)
        self.y2 = np.sin(2*np.pi*self.x)
        self.lines.plot(self.x, self.y1, color="red", label="cos(x)")
        self.lines.plot(self.x, self.y2, color="green", label="sin(x)")
        self.lines.legend()
        self.lines.set_xlabel("x")
        self.lines.set_ylabel("f(x)")
        FigureCanvas.__init__(self, self.fig)
if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    sys.exit(app.exec_())

実行結果

Matplotlib for Python Developers: Build Remarkable Publication Quality Plots the Easy Way
	Sandro Tosi Packt Publishing 2009-10-30 売り上げランキング : 86352 Amazonで詳しく見る by G-Tools