Question

我正在设计一个带有PyQt的GUI，当我点击一个按钮时，我需要显示一个matplotlib / pylab窗口，该按钮用于创建我创建的函数的数据图。这就像在Matlab中使用的运行时。每当我按下那个按钮时，我想保持matplotlib / pylab窗口作为我的窗口。

Answer 1

这是一个基本示例，它将使用QThread：

绘制三个不同的样本

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import random

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg
from matplotlib.figure import Figure

from PyQt4 import QtGui, QtCore

class MatplotlibWidget(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MatplotlibWidget, self).__init__(parent)

        self.figure = Figure()
        self.canvas = FigureCanvasQTAgg(self.figure)

        self.axis = self.figure.add_subplot(111)

        self.layoutVertical = QtGui.QVBoxLayout(self)
        self.layoutVertical.addWidget(self.canvas)

class ThreadSample(QtCore.QThread):
    newSample = QtCore.pyqtSignal(list)

    def __init__(self, parent=None):
        super(ThreadSample, self).__init__(parent)

    def run(self):
        randomSample = random.sample(range(0, 10), 10)

        self.newSample.emit(randomSample)

class MyWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.pushButtonPlot = QtGui.QPushButton(self)
        self.pushButtonPlot.setText("Plot")
        self.pushButtonPlot.clicked.connect(self.on_pushButtonPlot_clicked)

        self.matplotlibWidget = MatplotlibWidget(self)

        self.layoutVertical = QtGui.QVBoxLayout(self)
        self.layoutVertical.addWidget(self.pushButtonPlot)
        self.layoutVertical.addWidget(self.matplotlibWidget)

        self.threadSample = ThreadSample(self)
        self.threadSample.newSample.connect(self.on_threadSample_newSample)
        self.threadSample.finished.connect(self.on_threadSample_finished)

    @QtCore.pyqtSlot()
    def on_pushButtonPlot_clicked(self):
        self.samples = 0
        self.matplotlibWidget.axis.clear()
        self.threadSample.start()

    @QtCore.pyqtSlot(list)
    def on_threadSample_newSample(self, sample):
        self.matplotlibWidget.axis.plot(sample)
        self.matplotlibWidget.canvas.draw()

    @QtCore.pyqtSlot()
    def on_threadSample_finished(self):
        self.samples += 1
        if self.samples <= 2:
            self.threadSample.start()

if __name__ == "__main__":
    import sys

    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('MyWindow')

    main = MyWindow()
    main.resize(666, 333)
    main.show()

    sys.exit(app.exec_())

Answer 2

这是来自user1006989（最佳答案）的代码，适用于 PyQt5 ，希望它对某人有用：

以下是使用QThread绘制三个不同样本的基本示例：

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import random

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.figure import Figure

from PyQt5 import QtCore #conda install pyqt
from PyQt5 import QtWidgets

class MatplotlibWidget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(MatplotlibWidget, self).__init__(parent)

        self.figure = Figure()
        self.canvas = FigureCanvasQTAgg(self.figure)

        self.axis = self.figure.add_subplot(111)

        self.layoutVertical = QtWidgets.QVBoxLayout(self)#QVBoxLayout
        self.layoutVertical.addWidget(self.canvas)

class ThreadSample(QtCore.QThread):
    newSample = QtCore.pyqtSignal(list)

    def __init__(self, parent=None):
        super(ThreadSample, self).__init__(parent)

    def run(self):
        randomSample = random.sample(range(0, 10), 10)

        self.newSample.emit(randomSample)

class MyWindow(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.pushButtonPlot = QtWidgets.QPushButton(self)
        self.pushButtonPlot.setText("Plot")
        self.pushButtonPlot.clicked.connect(self.on_pushButtonPlot_clicked)

        self.matplotlibWidget = MatplotlibWidget(self)

        self.layoutVertical = QtWidgets.QVBoxLayout(self)
        self.layoutVertical.addWidget(self.pushButtonPlot)
        self.layoutVertical.addWidget(self.matplotlibWidget)

        self.threadSample = ThreadSample(self)
        self.threadSample.newSample.connect(self.on_threadSample_newSample)
        self.threadSample.finished.connect(self.on_threadSample_finished)

    @QtCore.pyqtSlot()
    def on_pushButtonPlot_clicked(self):
        self.samples = 0
        self.matplotlibWidget.axis.clear()
        self.threadSample.start()

    @QtCore.pyqtSlot(list)
    def on_threadSample_newSample(self, sample):
        self.matplotlibWidget.axis.plot(sample)
        self.matplotlibWidget.canvas.draw()

    @QtCore.pyqtSlot()
    def on_threadSample_finished(self):
        self.samples += 1
        if self.samples <= 2:
            self.threadSample.start()

if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    app.setApplicationName('MyWindow')

    main = MyWindow()
    main.resize(666, 333)
    main.show()

    sys.exit(app.exec_())

Answer 3

Eli Bendersky编写了一个在PyQt中使用matplotlib的代码示例：http://eli.thegreenplace.net/2009/01/20/matplotlib-with-pyqt-guis/

Answer 4

将Matplotlib与PyQt集成需要一些工作。这是一个例子： http://sourceforge.net/mailarchive/message.php?msg_id=29086544

但是，有一些专门围绕PyQt设计的绘图库：

pyqwt（编辑：不再维护）
guiqwt
pyqtgraph

Answer 5

如果我理解正确，你有一个带GUI的应用程序，你想在一个单独的窗口中绘制一个图形而不是GUI使用。 pyqtgraph可以做得很好。

在命令提示符中首先输入pip install pyqtgraph以安装pyqtgraph

然后

   import pyqtgraph as pg 

    pg.setConfigOption('background', 'w')      # sets background to white                                                 
    pg.setConfigOption('foreground', 'k')      # sets axis color to black

    pw = pg.plot(x, y, pen='g')                # 1st plot (green)                                           
    pw.plot(x2, y2, pen='b')                   # 2nd plot in same figure (blue)

    pw.setLabel('bottom', 'x-label')           # x-label
    pw.setLabel('left', 'y-label')             # y-label

更多信息： http://www.pyqtgraph.org/documentation/how_to_use.html

如何在我的GUI上绘图

5 个答案: