Test NumPy Array Values for Infiniteness and Store the Result

To test array values for infiniteness, use the numpy.isinf() method in Python Numpy. The new location where we will store the result is a new array. Returns a boolean array of the same shape as x, True where x == +/-inf, otherwise False.

NumPy uses the IEEE Standard for Binary Floating-Point for Arithmetic (IEEE 754). Errors result if the second argument is supplied when the first argument is a scalar, or if the first and second arguments have different shapes.

Steps

At first, import the required library −

import numpy as np

Create an array with some inf values −

arr = np.array([1, 2, 10, 50, -np.inf, 0., np.inf])

Display the array −

print("Array...
", arr)

Get the type of the array −

print("
Our Array type...
", arr.dtype)

Get the dimensions of the Array −

print("
Our Array Dimensions...
",arr.ndim)

Get the number of elements in the Array −

print("
Number of elements...
", arr.size)

Create another array with the same shape to store the result −

arrRes = np.array([5, 5, 5, 5, 5, 5, 5])

To test array values for infiniteness, use the numpy.isinf() method in Python Numpy. The new location where we will store the result is arrRes −

print("
Test array for infiniteness...
",np.isinf(arr, arrRes))

Check the value of the new array where our result is stored −

print("
Result...
",arrRes)

Example

import numpy as np

# Create an array with some inf values
arr = np.array([1, 2, 10, 50, -np.inf, 0., np.inf])

# Display the array
print("Array...
", arr)

# Get the type of the array
print("
Our Array type...
", arr.dtype)

# Get the dimensions of the Array
print("
Our Array Dimensions...
",arr.ndim)

# Get the number of elements in the Array
print("
Number of elements...
", arr.size)

# Create another array with the same shape to store the result
arrRes = np.array([5, 5, 5, 5, 5, 5, 5])

# To test array values for infiniteness, use the numpy.isfinite() method in Python Numpy
# The new location where we will store the result is arrRes
print("
Test array for infiniteness...
",np.isinf(arr, arrRes))

# Check the value of the new array where our result is stored
print("
Result...
",arrRes)

Output

Array...
[ 1. 2. 10. 50. -inf 0. inf]

Our Array type...
float64

Our Array Dimensions...
1

Number of elements...
7

Test array for infiniteness...
[0 0 0 0 1 0 1]

Result...
[0 0 0 0 1 0 1]