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 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 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.