﻿ NumPy: Rearrange columns of a given numpy 2D array using given index positions - w3resource # NumPy: Rearrange columns of a given numpy 2D array using given index positions

## NumPy: Array Object Exercise-159 with Solution

Write a NumPy program to rearrange columns of a given numpy 2D array using given index positions.

Sample Solution:

Python Code:

``````import numpy as np
array1 = np.array([[11, 22, 33, 44, 55],
[66,  77,  88,  99, 100]])
print("Original arrays:")
print(array1)
i = [1,3,0,4,2]
result = array1[:,i]
print("New array:")
print(result)
```
```

Sample Output:

```Original arrays:
[[ 11  22  33  44  55]
[ 66  77  88  99 100]]
New array:
[[ 22  44  11  55  33]
[ 77  99  66 100  88]]
```

Pictorial Presentation: Python Code Editor:

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## Python: Tips of the Day

List comprehension:

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