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NumPy: Create a 3x3x3 array filled with arbitrary values

NumPy: Basic Exercise-31 with Solution

Write a NumPy program to create a 3x3x3 array filled with arbitrary values.

Sample Solution :

Python Code :

import numpy as np
x = np.random.random((3, 3, 3))
print(x)

Sample Output:

[[[ 0.51919099  0.31268732  0.58506582]
  [ 0.12730206  0.30556451  0.55981097]
  [ 0.92910493  0.73947119  0.14252086]]

 [[ 0.96159407  0.21341612  0.6814465 ]
  [ 0.71884351  0.01271011  0.98812225]
  [ 0.47553515  0.04584955  0.59425412]]

 [[ 0.44064227  0.26612916  0.58861619]
  [ 0.37935141  0.0640071   0.53717733]
  [ 0.77986385  0.0771148   0.92183522]]]

Pictorial Presentation:

NumPy: Create a 3x3x3 array filled with arbitrary values.

Python-Numpy Code Editor:

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Previous: Write a NumPy program to create an 4x4 matrix in which 0 and 1 are staggered, with zeros on the main diagonal.
Next: Write a NumPy program to compute sum of all elements, sum of each column and sum of each row of an given array.

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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