NumPy: Test a given array element-wise for finiteness (not infinity or not a Number)

NumPy: Basic Exercise-5 with Solution

Write a NumPy program to test a given array element-wise for finiteness (not infinity or not a number).

Sample Solution :

Python Code :

# Importing the NumPy library with an alias 'np'
import numpy as np

# Creating a NumPy array 'a' containing elements 1, 0, NaN (Not a Number), and infinity
a = np.array([1, 0, np.nan, np.inf])

# Printing the original array 'a'
print("Original array")
print(a)

# Checking the given array 'a' element-wise for finiteness and printing the result
print("Test a given array element-wise for finiteness :")
print(np.isfinite(a)) 

Sample Output:

Original array
[  1.   0.  nan  inf]
Test a given array element-wise for finiteness :
[ True  True False False]                         

Explanation:

In the above example -

np.isfinite() function is used to test element-wise if the values in the array 'a' are finite. The function returns a boolean array of the same shape as 'a', with True for finite values (1 and 0) and False for non-finite values (NaN and Inf).

Pictorial Presentation:

Python-Numpy Code Editor:

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