Min and max values of an array in Python

Question

I want to calculate the minimum and maximum values of array A but I want to exclude all values less than 1e-12. I present the current and expected outputs.

import numpy as np
A=np.array([[9.49108487e-05],
       [1.05634586e-19],
       [5.68676707e-17],
       [1.02453254e-06],
       [2.48792902e-16],
       [1.02453254e-06]])

Min=np.min(A)
Max=np.max(A)
print(Min,Max)

The current output is

1.05634586e-19 9.49108487e-05

The expected output is

1.02453254e-06 9.49108487e-05

mozway · Accepted Answer · 2022-12-02 14:26:18Z

3

Slice with boolean indexing before getting the min/max:

B = A[A>1e-12]
Min = np.min(B)
Max = np.max(B)
print(Min, Max)

Output: 1.02453254e-06 9.49108487e-05

B: array([9.49108487e-05, 1.02453254e-06, 1.02453254e-06])

answered Dec 2, 2022 at 14:26

mozway

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sj95126 · Accepted Answer · 2022-12-02 14:26:26Z

2

You can just select the values of the array greater than 1e-12 first and obtain the min and max of that:

>>> A[A > 1e-12].min()
1.02453254e-06
>>> A[A > 1e-12].max()
9.49108487e-05

answered Dec 2, 2022 at 14:26

sj95126

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Raza Ahmed · Accepted Answer · 2022-12-02 14:49:06Z

1

arr = np.array([9.49108487e-05,1.05634586e-19,5.68676707e-17,1.02453254e-06,2.48792902e-16,1.02453254e-06]) 
mask = arr > 1e-12 
Min = np.min(arr[mask]) 
Max = np.max(arr[mask])

answered Dec 2, 2022 at 14:49

Raza Ahmed

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