How to convert scipy find peaks to list-CodePudding

How to convert scipy find_peaks values result to list? I want to sort the amplitude values.

p = find_peaks(data,height=60,distance=3)
p_ind,p_val = p
a=list(p_val.values())
a.sort(reverse=True)

The problem here is the command is executing without any error, but sorting does not take place because 'a' is a list containing only one element which is an array. I want to sort that array and address it like a[1], a[2], etc,.

The value of a is

[array([76., 66., 60., 61., 63., 82., 67., 72., 69., 65., 71., 77., 66., 80., 67., 73., 65., 75., 76., 72., 68., 71., 76., 74., 73., 71., 71., 71., 71., 78., 66., 80., 63., 64., 74., 69., 68., 66., 73., 66., 77., 74., 74., 67., 64., 72., 69., 69., 62., 72., 63., 68., 69., 69., 65., 66., 63., 64., 61., 67.])]

I know it sounds like a simple doubt, but I am unable to find it out. Any help would be appreciated.

CodePudding user response：

a=[array('d',[76., 66., 60., 61., 63., 82., 67., 72., 69.])]
print(a)
a=list(a[0])
a.sort(reverse=True)
print(a)

You can take the element at 0 position index (array in list). This is an iterable and you can assign again to 'a' variable. Now 'a' is a list and you can call sort method with reverse parameter.

CodePudding user response：

For height, the first element is considered as the minimum value therefore give range accordingly. And while extracting peak_heights, peak_val is a dictionary so select 'peak_heights' from it.

peak_ind, peak_val  = find_peaks(data, height = [0,60], distance = 3)
a = list(peak_val['peak_heights'])
b = sorted(a)
print(b)

[0.005, 0.015, 0.02, 0.025, 0.03, 0.03, 0.045, 0.05, 0.055, 0.055, 0.065, 0.065, 0.07, 0.09, 0.105, 0.105, 0.135, 0.16, 0.165, 0.2, 0.205, 0.21, 0.23, 0.235, 0.24, 0.245, 0.245, 0.26, 0.265, 0.265, 0.28, 0.29, 0.3, 0.31, 0.31, 0.32, 0.32, 0.33, 0.335, 0.335, 0.35, 0.36, 0.36, 0.36, 0.36, 0.36, 0.365, 0.365, 0.375, 0.39, 0.395, 0.4, 0.42, 0.43, 0.435, 0.44, 0.44, 0.445, 0.445, 0.445, 0.45, 0.455, 0.46, 0.465, 0.465, 0.47, 0.48, 0.495, 0.505, 0.51, 0.515, 0.525, 0.535, 0.535, 0.54, 0.54, 0.545, 0.55, 0.55, 0.55, 0.55, 0.555, 0.56, 0.56, 0.56, 0.565, 0.57, 0.585, 0.585, 0.59, 0.59, 0.595, 0.6, 0.605, 0.625, 0.625, 0.625, 0.63, 0.635, 0.655, 0.66, 0.665, 0.665, 0.7, 0.705, 0.705, 0.705, 0.71, 0.71, 0.71, 0.72, 0.72, 0.75, 0.76, 0.77, 0.775, 0.78, 0.81, 0.83, 0.84, 0.88, 0.9, 0.92, 0.935, 0.95, 0.955, 1.155, 1.2, 1.37, 1.705, 1.745, 1.925, 1.96, 2.09]