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：

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曲线')
	p1.plot(x)
	p2 = win.addPlot(title='y曲线')
	p2.plot(y)
	app.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_()