使用PyQtGraph绘制图形（2）

采用addplot()方法将多个图形添加到一个窗口。

首先利用numpy模块创建两个随机数组，用来作为图形绘制的数据：

from pyqtgraph.Qt import QtCore<br>import pyqtgraph as pg
import numpy as np
  
x = np.random.random(50)
y = np.random.random(10)

def pg_addplot():
    win = pg.GraphicsLayoutWidget(show=True)
　　  # win.resize(800,400)
        # win.setWindowTitle('pyqtgraph example: Plotting')
        win.setBackground('w')
        # Enable antialiasing for prettier plots
        pg.setConfigOptions(antialias=True)
 
        p1 = win.addPlot()
        p1.addLegend()
        p1.plot(x,pen = 'r',name = 'red curve')
        #win.nextRow()
        p2 = win.addPlot(title = 'y curve')
        p2.plot(y,pen='b',name = 'blue curve')
 
        pg.exec()

上图为1行2列布置，通过nextRow()更改为2行1列

def pg_addplot():
    app = pg.QtGui.QApplication([])
    win = pg.GraphicsWindow(title="PyQtGraph Tutorial")
    p1 = win.addPlot(title='x曲线')
    p1.plot(x)
        win.nextRow()
    p2 = win.addPlot(title='y曲线')
    p2.plot(y)  
    app.exec_()

将多个图形放置在一个窗口内，并且占用不同列数

def pg_addplot():
    app = pg.QtGui.QApplication([])
    win = pg.GraphicsWindow(title="PyQtGraph Tutorial")
    p1 = win.addPlot(title='x曲线')
    p1.plot(x)  
    p2 = win.addPlot(title='y曲线')
    p2.plot(y)
    win.nextRow() 
    p3 = win.addPlot(colspan=2,title='z 曲线')
    p3.plot(z)  
    app.exec_()