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numpy.isfinite() in Python

numpy.isposinf() in Python

Last Updated : 08 Mar, 2024

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The numpy.isposinf() function tests element-wise whether it is positive infinity or not and returns the result as a boolean array.

Syntax :

numpy.isposinf(array, y = None)

Parameters:

array : [array_like]Input array or object whose elements, we need to test for infinity.  y     : [array_like]A boolean array with the same shape and type as x to store the result.

Return:

boolean array containing the result. For scalar input, the result is a new boolean with value  True if the input is positive or negative infinity; otherwise the value is False.  For array input, the result is a boolean array with the same shape as the input and the values  are True where the corresponding element of the input is positive or negative infinity;   elsewhere the values are False.

Code 1:

Python

   # Python Program illustrating 
# numpy.isposinf() method 
   
import numpy as geek  
  
print("Positive : ", geek.isposinf(1), "\n") 
  
print("Positive : ", geek.isposinf(0), "\n") 
  
# not a number 
print("Positive : ", geek.isposinf(geek.nan), "\n") 
  
#  infinity 
print("Positive : ", geek.isposinf(geek.inf), "\n") 
  
print("Positive : ", geek.isposinf(geek.NINF), "\n")  
  
x = geek.array([-geek.inf, 0., geek.inf]) 
y = geek.array([2, 2, 2]) 
print("Checking for positivity : ", geek.isposinf(x, y)) 
 
  

Output :

Positive :  False     Positive :  False     Positive :  False     Positive :  True     Positive :  False     Checking for positivity :  [0 0 1]

Code 2 :

Python

   # Python Program illustrating 
# numpy.isposinf() method 
    
import numpy as geek  
   
# Returns True/False value for each element  
b = geek.arange(18).reshape(3, 6) 
                 
print("\n",b) 
print("\nIs Positive Infinity : \n", geek.isposinf(b)) 
  
# geek.inf means Infinity 
# geek.NINF means negative infinity 
b = [[geek.inf],  
     [geek.NINF]] 
print("\nIs Positive Infinity : \n", geek.isposinf(b)) 
 
  

Output :

 [[ 0  1  2  3  4  5]   [ 6  7  8  9 10 11]   [12 13 14 15 16 17]]    Is Positive Infinity :    [[False False False False False False]   [False False False False False False]   [False False False False False False]]    Is Positive Infinity :    [[ True]   [False]]

Note :
These codes won’t run on online IDE’s. So please, run them on your systems to explore the working.

numpy.isfinite() in Python

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Practice Tags :

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