def tickStrings(self, values, scale, spacing):
strns = []
rng = max(values) - min(values)
#if rng < 120:
# return pg.AxisItem.tickStrings(self, values, scale, spacing)
if rng < 3600 * 24:
string = '%H:%M:%S'
label1 = '%b %d -'
label2 = ' %b %d, %Y'
elif rng >= 3600 * 24 and rng < 3600 * 24 * 30:
string = '%d'
label1 = '%b - '
label2 = '%b, %Y'
elif rng >= 3600 * 24 * 30 and rng < 3600 * 24 * 30 * 24:
string = '%b'
label1 = '%Y -'
label2 = ' %Y'
elif rng >= 3600 * 24 * 30 * 24:
string = '%Y'
label1 = ''
label2 = ''
for x in values:
try:
strns.append(time.strftime(string, time.localtime(x)))
except ValueError: ## Windows can't handle dates before 1970
strns.append('')
try:
label = time.strftime(label1, time.localtime(
min(values))) + time.strftime(label2,
time.localtime(max(values)))
except ValueError:
label = ''
#self.setLabel(text=label)
return strns
import numpy as np
from numpy import fft
import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore
from pyqtgraph.ptime import time
import time
import serial
# Create serial port and file for writing data
port_name = "COM4"
baudrate = 9600
ser = serial.Serial(port_name, baudrate)
# Creates file with current time to store data in csv format
# "raw-" indicates all four values are the raw data as opposed to fourier transformed
timestr = time.strftime("%Y%m%d-%H%M%S")
datafile = open("raw-" + timestr + ".txt", "w+")
datafile.write("port1,port2,port3,port4\n")
# Initializing all the windows/plots
app = QtGui.QApplication([])
view = pg.GraphicsView()
view.resize(800, 500)
win = pg.GraphicsLayout()
view.setCentralItem(win)
view.show()
view.setWindowTitle('Live plots of EEG from 4 channels')
# Top label
win.addLabel('Raw signal from Arduino', colspan=4)
