NumPy: Create a new vector with 2 consecutive 0 between two values of a given vector
Insert zeros between elements in an array.
Write a NumPy program to create a new vector with 2 consecutive 0 between two values of a given vector.
Pictorial Presentation:
Sample Solution:
Python Code:
# Importing the NumPy library
import numpy as np
# Creating a NumPy array 'nums' containing numbers from 1 to 8
nums = np.array([1, 2, 3, 4, 5, 6, 7, 8])
# Displaying the original array 'nums'
print("Original array:")
print(nums)
# Variable 'p' set to 2
p = 2
# Creating a new array 'new_nums' of length len(nums) + (len(nums) - 1) * p filled with zeros
new_nums = np.zeros(len(nums) + (len(nums) - 1) * (p))
# Filling the 'new_nums' array with elements from 'nums' at intervals of (p + 1)
new_nums[::p + 1] = nums
# Displaying the new array 'new_nums'
print("\nNew array:")
print(new_nums)
Sample Output:
Original array: [1 2 3 4 5 6 7 8] New array: [1. 0. 0. 2. 0. 0. 3. 0. 0. 4. 0. 0. 5. 0. 0. 6. 0. 0. 7. 0. 0. 8.]
Explanation:
In the above code -
nums = np.array([1,2,3,4,5,6,7,8]): Initializes a NumPy array nums with values 1 to 8.
p = 2: Sets the value of p to 2, meaning 2 zeros will be inserted between each element of the original array.
new_nums = np.zeros(len(nums) + (len(nums)-1)*(p)): This line creates a new NumPy array new_nums filled with zeros. The length of new_nums is calculated based on the length of the original array and the number of zeros to be inserted between each element.
new_nums[::p+1] = nums: This line assigns the elements of the original array nums to the corresponding positions in the new array new_nums, skipping p+1 indices for each assignment.
For more Practice: Solve these Related Problems:
- Write a NumPy program to insert two zeros between each element of a 1D array using np.insert in a loop-free manner.
- Create a function that interleaves an array with a specified filler value and returns the new array.
- Implement a solution that uses np.reshape and np.hstack to achieve the insertion of zeros between elements.
- Test the function on arrays of various lengths to verify that the inserted zeros are correctly positioned.
Go to:
PREV : Create array using generator function.
NEXT : Multiply arrays of compatible dimensions.
Python-Numpy Code Editor:
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.