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NumPy: Extract first, third and fifth elements of the third and fifth rows from a given (6x6) array

NumPy: Array Object Exercise-145 with Solution

Write a NumPy program to extract first, third and fifth elements of the third and fifth rows from a given (6x6) array.

Pictorial Presentation:

NumPy: Extract first, third and fifth elements of the third and fifth rows from a given (6x6) array

Sample Solution:

Python Code:

import numpy as np
arra_data = np.arange(0,36).reshape((6, 6))
print("Original array:")
print(arra_data)
print("\nExtracted data: First, third and fifth elements of the third and fifth rows")
print(arra_data[2::2, ::2]) 

Sample Output:

Original array:
[[ 0  1  2  3  4  5]
 [ 6  7  8  9 10 11]
 [12 13 14 15 16 17]
 [18 19 20 21 22 23]
 [24 25 26 27 28 29]
 [30 31 32 33 34 35]]

Extracted data: First, third and fifth elements of the third and fifth rows
[[12 14 16]
 [24 26 28]]

Python Code Editor:

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Previous: Write a NumPy program to extract second and third elements of the second and third rows from a given (4x4) array.
Next: Write a NumPy program to add two arrays A and B of sizes (3,3) and (,3).

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Python: Tips of the Day

Set comprehension:

>>> m = {x ** 2 for x in range(5)}
>>> m
{0, 1, 4, 9, 16}