使用PyQtGraph繪制圖形（2）

采用addplot()方法將多個圖形添加到一個窗口。

首先利用numpy模塊創建兩個隨機數組，用來作為圖形繪制的數據：

import pyqtgraph as pg
import numpy as np
 
x = np.random.random(50)
y = np.random.random(10)
z = np.r_[x,y]

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

上圖為1行2列布置，通過nextRow()更改為2行1列

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

將多個圖形放置在一個窗口內，並且占用不同列數

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