iPhoneで心拍を取るテスト。Pythonista 用。実行すると5秒後から５秒間測定を行います。仰向けになってiPhoneを胸の上に置き、息を止めてじっとしていてください。

acc.py

'''This script records your device's orientation (accelerometer data) for 5 seconds, and then renders a simple plot of the gravity vector, using matplotlib.'''

import motion
import matplotlib.pyplot as plt
from time import sleep
import console


def main():
	motion.start_updates()
	sleep(0.2)
	print('Capturing motion data...')
	num_samples = 1000
	data = []
	sleep(5)
	
	for i in range(num_samples):
		sleep(0.005)
		g = motion.get_gravity()
		data.append(g)
	motion.stop_updates()
	print('Capture finished, plotting...')
	
	data2 = []
	f = 5
	for i in range(num_samples-f):
		u = 0
		for j in range(f):
			u=u+data[i+j][2]
		data2.append((data[i][2]-u/f)*5000)
	
	x_values = [x*0.005 for x in range(num_samples-f)]
	
	plt.plot(x_values, data2, 'R', lw=2)
	plt.grid(True)
	plt.xlabel('t')
	plt.ylabel('G')
	plt.gca().set_ylim([-1.0, 1.0])
	plt.legend()
	plt.show()

if __name__ == '__main__':
	main()