1 # -*- coding: utf-8 -*-#
2
3 #-------------------------------------------------------------------------------
4 # Name: 1
5 # Description:
6 # Author: Administrator
7 # Date: 2018/5/28
8 #-------------------------------------------------------------------------------
9
10 import numpy as np
11 import pyqtgraph as pg
12
13 app = pg.mkQApp()
14
15 win = pg.GraphicsWindow()
16 win.setWindowTitle(u'pyqtgraph plot demo')
17 win.resize(600, 400)
18
19 p = win.addPlot()
20 p.showGrid(x=True, y=True)
21 p.setLabel(axis='left', text=u'Amplitude / V')
22 p.setLabel(axis='bottom', text=u't / s')
23 p.setTitle('y1=sin(x) y2=cos(x)')
24 p.addLegend()
25
26 curve1 = p.plot(pen='r', name='y1')
27 curve2 = p.plot(pen='g', name='y2')
28
29 Fs = 1024.0 #采样频率
30 N = 1024 #采样点数
31 f0 = 5.0 #信号频率
32 pha = 0 #初始相位
33 t = np.arange(N) / Fs #时间向量
34
35 def plotData():
36 global pha
37 pha += 10
38 curve1.setData(t, np.sin(2 * np.pi * f0 * t + pha*np.pi/180.0))
39 curve2.setData(t, np.cos(2 * np.pi * f0 * t + pha*np.pi/180.0))
40
41 timer = pg.QtCore.QTimer()
42 timer.timeout.connect(plotData)
43 timer.start(50)
44
45 app.exec_()
