Python 如何使用matplotlib';在PyQt文本字段中显示值;s对象拾取功能?
我使用PyQt 4作为基本GUI,使用matplotlib作为绘图,从中读取绘图数据点的坐标。基于(简单拾取示例),我有一个简单的问题,即无法在文本字段(如QtGui.QLabel())中显示数据点的坐标。我不明白为什么我不能在方法Python 如何使用matplotlib';在PyQt文本字段中显示值;s对象拾取功能?,python,matplotlib,pyqt,qtgui,Python,Matplotlib,Pyqt,Qtgui,我使用PyQt 4作为基本GUI,使用matplotlib作为绘图,从中读取绘图数据点的坐标。基于(简单拾取示例),我有一个简单的问题,即无法在文本字段(如QtGui.QLabel())中显示数据点的坐标。我不明白为什么我不能在方法onpick()中调用实例Window.msg。可能是因为它没有将实例提供给该方法。我只对面向对象编程有一个基本的了解(但我正在研究它),所以问题是我缺乏知识 我的问题:如何在我的GUI中基于PyQT(在我的标签lbl)的matplotlib绘图中显示所选数据的坐标(
onpick()
中调用实例Window.msg
。可能是因为它没有将实例提供给该方法。我只对面向对象编程有一个基本的了解(但我正在研究它),所以问题是我缺乏知识
我的问题:如何在我的GUI中基于PyQT(在我的标签lbl
)的matplotlib绘图中显示所选数据的坐标(通过单击它)
另外,在绘图中突出显示选定的数据点也很好
这是我的代码(工作代码):
选择器正在重叠自我(不确定原因)。在任何情况下,这都应该起作用:
import numpy as np
import matplotlib.pyplot as plt
from PyQt4 import QtGui
import sys
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
import matplotlib.pyplot as plt
class Window(QtGui.QDialog):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.initUI()
def initUI(self):
self.msg = '0'
# a figure instance to plot on
self.figure = plt.figure()
self.canvas = FigureCanvas(self.figure)
self.toolbar = NavigationToolbar(self.canvas, self)
# a label
self.lbl = QtGui.QLabel(self.msg)
# set the layout
layout = QtGui.QVBoxLayout()
layout.addWidget(self.toolbar)
layout.addWidget(self.canvas)
layout.addWidget(self.lbl)
self.setLayout(layout)
self.plot()
def changelabel(arg):
main.lbl.setText(str(arg[0])+' '+str(arg[1]))
def plot(self):
# random data
data = [np.random.random() for i in range(10)]
# create an axis
ax = self.figure.add_subplot(111)
# discards the old graph
ax.hold(False)
# plot data
line, = ax.plot(data, 'o', picker=5) # 5 points tolerance
self.canvas.draw()
self.canvas.mpl_connect('pick_event', Window.onpick)
def onpick(self):
thisline = self.artist
xdata = thisline.get_xdata()
ydata = thisline.get_ydata()
ind = self.ind
# show data
self.msg = (xdata[ind], ydata[ind])
print(self.msg)
# Window.changelabel(self.msg)
main.lbl.setText(str(self.msg[0])+' '+str(self.msg[1]))
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
main = Window()
main.show()
sys.exit(app.exec_())
,更改在setText
函数中,因为我直接从变量调用它(noself
或窗口
)
选择器正在重叠自我(不确定原因)。在任何情况下,这都应该起作用:
import numpy as np
import matplotlib.pyplot as plt
from PyQt4 import QtGui
import sys
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
import matplotlib.pyplot as plt
class Window(QtGui.QDialog):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.initUI()
def initUI(self):
self.msg = '0'
# a figure instance to plot on
self.figure = plt.figure()
self.canvas = FigureCanvas(self.figure)
self.toolbar = NavigationToolbar(self.canvas, self)
# a label
self.lbl = QtGui.QLabel(self.msg)
# set the layout
layout = QtGui.QVBoxLayout()
layout.addWidget(self.toolbar)
layout.addWidget(self.canvas)
layout.addWidget(self.lbl)
self.setLayout(layout)
self.plot()
def changelabel(arg):
main.lbl.setText(str(arg[0])+' '+str(arg[1]))
def plot(self):
# random data
data = [np.random.random() for i in range(10)]
# create an axis
ax = self.figure.add_subplot(111)
# discards the old graph
ax.hold(False)
# plot data
line, = ax.plot(data, 'o', picker=5) # 5 points tolerance
self.canvas.draw()
self.canvas.mpl_connect('pick_event', Window.onpick)
def onpick(self):
thisline = self.artist
xdata = thisline.get_xdata()
ydata = thisline.get_ydata()
ind = self.ind
# show data
self.msg = (xdata[ind], ydata[ind])
print(self.msg)
# Window.changelabel(self.msg)
main.lbl.setText(str(self.msg[0])+' '+str(self.msg[1]))
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
main = Window()
main.show()
sys.exit(app.exec_())
,更改在setText
函数中,因为我直接从变量调用它(noself
或窗口
)
main.lbl.setText(str(self.msg[0])+' '+str(self.msg[1]))