峰值检测电路(峰峰值和峰值)

import matplotlib.pyplot as plt
import numpy as np
import h5py

def nms_3(data):
    length=len(data)
    ans=[]
    for i in range(2,length-2):
        if data[i] >= data[i-1] and data[i] >= data[i+1] :
            ans.append(i)
    return ans

if __name__ == '__main__':
    f = h5py.File("data.hdf5", "r")
    keys = f.keys()
    pulse = []
    time = []
    for e in f['pulse']:
        pulse.append(e)
    for e in f['time']:
        time.append(e)
    print("the len of pulse is %d" % (len(pulse)))
    print("the len of time is %d" % (len(time)))

    pulse = np.array(pulse)
    plt.figure()
    
    # # 时间为横轴，单位转换复杂 不知道抽样频率。 还是以样本数量为横轴，刚好对应
    # plt.plot(time, pulse)
    # plt.xlabel('time')  # 时间60s
    # plt.title('time-pulse')  # 添加图片标题
    
    # 以样本数量为横轴，刚好对应
    plt.plot(np.arange(len(pulse)), pulse)
    plt.xlabel('Number of samples')  # 样本数量 len(pulse)=len(time)
    plt.title('Number of samples-pulse-pulse')  # 添加图片标题
    point = nms_3(pulse)
    plt.plot(point, pulse[point], "o")
    print(point)
    plt.show()
    exit()