﻿ NumPy: Extract second and fourth elements of the second and fourth rows from a given (4x4) array - w3resource # NumPy: Extract second and fourth elements of the second and fourth rows from a given (4x4) array

## NumPy: Array Object Exercise-140 with Solution

Write a NumPy program to extract second and fourth elements of the second and fourth rows from a given (4x4) array.

Pictorial Presentation: Sample Solution:

Python Code:

``````import numpy as np
arra_data = np.arange(0,16).reshape((4, 4))
print("Original array:")
print(arra_data)
print("\nExtracted data: Second and fourth elements of the second and fourth rows ")
print(arra_data[1::2, 1::2])
```
```

Sample Output:

```Original array:
[[ 0  1  2  3]
[ 4  5  6  7]
[ 8  9 10 11]
[12 13 14 15]]

Extracted data: Second and fourth elements of the second and fourth rows
[[ 5  7]
[13 15]]
```

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

What is the difficulty level of this exercise?

Test your Python skills with w3resource's quiz

﻿

## Python: Tips of the Day

Set comprehension:

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