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NumPy: Test two arrays are equal (element wise) or not

NumPy: Basic Exercise-44 with Solution

Write a NumPy program to check whether two arrays are equal (element wise) or not.

Sample Solution :

Python Code :

import numpy as np
nums1 = np.array([0.5, 1.5, 0.2])
nums2 = np.array([0.4999999999, 1.500000000, 0.2])
np.set_printoptions(precision=15)
print("Original arrays:")
print(nums1)
print(nums2)
print("\nTest said two arrays are equal (element wise) or not:?")
print(nums1 == nums2)
nums1 = np.array([0.5, 1.5, 0.23])
nums2 = np.array([0.4999999999, 1.5000000001, 0.23])
print("\nOriginal arrays:")
np.set_printoptions(precision=15)
print(nums1)
print(nums2)
print("\nTest said two arrays are equal (element wise) or not:?")
print(np.equal(nums1, nums2))

Sample Output:

Original arrays:
[0.5 1.5 0.2]
[0.4999999999 1.5          0.2         ]

Test said two arrays are equal (element wise) or not:?
[False  True  True]

Original arrays:
[0.5  1.5  0.23]
[0.4999999999 1.5000000001 0.23        ]

Test said two arrays are equal (element wise) or not:?
[False False  True]

Python-Numpy Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m