查找5個局部最大值和最小值點以及python中的極值點

Question

我在Stack Overflow找到了一些代碼。但它不適用於浮點數。我試圖找到5個局部最大值和最小值加上極值。任何幫助，將不勝感激。

from scipy.stats import gaussian_kde 
import matplotlib.pyplot as plt 
import numpy as np 
from scipy.signal import argrelextrema 
import matplotlib.pyplot as plt 

y=[ 191.78 , 191.59, 191.59, 191.41, 191.47, 191.33, 191.25 \ 
    ,191.33 , 191.48 , 191.48, 191.51, 191.43, 191.42, 191.54 \ 
    ,191.5975, 191.555, 191.52 , 191.25 , 191.15 , 191.01 ] 
x = np.linspace(1 ,20,len(y)) 


fig, ax = plt.subplots(figsize=(10, 10)) 
ax.legend(loc='center left', bbox_to_anchor=(1.05, 0.5), frameon=False) 
ax.scatter(x, y, color='black', label='data') 
ax.plot(x,y,color='red') 


sortId=np.argsort(x) 
x=x[sortId] 
y=y[sortId] 

#this way the x-axis corresponds to the index of x 
plt.plot(x-1,y) 
plt.show() 
maxm = argrelextrema(y, np.greater) 
minm = argrelextrema(y, np.less) 

Answer 1

我做更多的研究，答案是使用適當的陣列和陣列numpy的如下顯示：

def check(self, data): 
     dataarr = np.asarray(data) 
     extmax = argrelextrema(dataarr, np.greater) 
     extmin = argrelextrema(dataarr, np.less)