pyqtgraph--用addplot绘制图像

import pyqtgraph as pg
import numpy as np

a = np.random.random(50)
b = np.random.random(10)
c = np.r_[a, b]

app = pg.QtGui.QApplication([])
win = pg.GraphicsWindow(title="绘图窗口")  #创建绘图窗口
p1 = win.addPlot(title='a曲线')  #在绘图窗口win中添加一个坐标
p1.plot(a)  #在坐标p1中绘制a曲线
p2 = win.addPlot(title='b曲线')
p2.plot(b)
p3=win.addPlot(title='z曲线')
p3.plot(c,pen = 'b')
#pen = 'b'   曲线颜色
app.exec_()

以上各图是水平分布的

import pyqtgraph as pg
import numpy as np

a = np.random.random(50)
b = np.random.random(10)
c = np.r_[a, b]

app = pg.QtGui.QApplication([])
win = pg.GraphicsWindow(title="绘图窗口")  
p1 = win.addPlot(title='a曲线')  
p1.plot(a)  
win.nextRow()  #在窗口win中指向下一行
p2 = win.addPlot(title='b曲线')
p2.plot(b)
p3=win.addPlot(title='z曲线')
p3.plot(c,pen = 'b')
#pen = 'b'   
app.exec_()

效果图：

以上各图的大小是一样的

import pyqtgraph as pg
import numpy as np

a = np.random.random(50)
b = np.random.random(10)
c = np.r_[a, b]

app = pg.QtGui.QApplication([])
win = pg.GraphicsWindow(title="绘图窗口")  
p1 = win.addPlot(colspan=2,title='a曲线')  
#colspan=2    占用两列
p1.plot(a)  
win.nextRow()  
p2 = win.addPlot(title='b曲线')
p2.plot(b)
p3=win.addPlot(title='z曲线')
p3.plot(c,pen = 'b')
app.exec_()

效果图：