pyqt5画图折线图

 

 

 

 

 

 

 

 

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from PyQt5 import QtWidgets, uic   #from PyQt5.QtWidgets import QPushButton,QWidget,QApplication,QGridLayout,QListWidget,QLineEdit import pyqtgraph as pg import sys import numpy as np       class Example(QtWidgets.QMainWindow):     def __init__(self):         super(Example, self).__init__()         uic.loadUi('mian1.ui', self)                    self.initUI()                 def initUI(self):            self.linePlot()         self.three_curves()         pass               def linePlot(self):         plt1 = pg.PlotWidget()         plt1.plot([i for i in range(10)], [i * i for i in range(10)])         self.verticalLayout1.addWidget(plt1)       def three_curves(self):         plt2 = pg.PlotWidget(title="Three plot curves")         x = np.arange(1000)         y = np.random.normal(size=(3, 1000))         for i in range(3):             plt2.plot(x, y[i], pen=(i, 3))  ## setting pen=(i,3) 自动创建3个不同颜色的笔                  self.verticalLayout2.addWidget(plt2)    if __name__ == '__main__':     app = QtWidgets.QApplication(sys.argv)     ex = Example()     ex.show()     sys.exit(app.exec_())