﻿ NumPy: Create a vector with values ​​from 0 to 20 and change the sign of the numbers in the range from 9 to 15 - w3resource NumPy: Create a vector with values ​​from 0 to 20 and change the sign of the numbers in the range from 9 to 15

NumPy: Basic Exercise-22 with Solution

Write a NumPy program to create a vector with values ​​from 0 to 20 and change the sign of the numbers in the range from 9 to 15.

Sample Solution :

Python Code :

import numpy as np
x = np.arange(20)
print("Original vector:")
print(x)
print("After changing the sign of the numbers in the range from 9 to 15:")
x[(x >= 9) & (x <= 15)] *= -1
print(x)

Sample Output:

Original vector:
[ 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19]
After changing the sign of the numbers in the range from 9 to 15:
[  0   1   2   3   4   5   6   7   8  -9 -10 -11 -12 -13 -14 -15  16  17
18  19]

Pictorial Presentation: 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?

﻿