Array Manipulation

Array manipulation involves various methods for adding, removing, and modifying elements in an array. These methods allow us to dynamically update the contents of an array based on our specific needs.

Adding Elements to an Array

To add elements to an array in Python, we can use the append() method. This method appends the specified element to the end of the array.

Here's an example:

1# Creating an empty array
2arr = []
3
4# Adding elements to the array
5arr.append(1)
6arr.append(2)
7arr.append(3)
8
9print(arr)  # Output: [1, 2, 3]

In this example, we create an empty array arr and then add elements 1, 2, and 3 to the array using the append() method. Finally, we print the updated array, which will output [1, 2, 3].

Removing Elements from an Array

To remove elements from an array in Python, we have multiple options. One common method is to use the remove() method, which removes the first occurrence of the specified element from the array.

Here's an example:

1# Removing an element by value
2arr.remove(2)
3
4print(arr)  # Output: [1, 3]

In this example, we remove the element 2 from the array arr using the remove() method. After removing the element, the array will contain [1, 3].

Modifying Elements in an Array

To modify elements in an array, we can simply assign a new value to the desired index in the array.

Here's an example:

1# Modifying an element at a specific index
2arr[1] = 4
3
4print(arr)  # Output: [1, 4]

In this example, we modify the element at index 1 in the array arr by assigning a new value 4 to it. After the modification, the array will be [1, 4].

Array manipulation methods like adding, removing, and modifying elements allow us to update the content of an array dynamically. These methods are essential for working with arrays in various programming scenarios, including robotics and computer vision applications.

xxxxxxxxxx

# Example 1: Adding Elements to an Array

​

# Creating an empty array

arr = []

​

# Adding elements to the array

arr.append(1)

arr.append(2)

arr.append(3)

​

print(arr)  # Output: [1, 2, 3]

​

​

# Example 2: Removing Elements from an Array

​

# Removing an element by value

arr.remove(2)

​

print(arr)  # Output: [1, 3]

​

​

# Example 3: Modifying Elements in an Array

​

# Modifying an element at a specific index

arr[1] = 4

​

print(arr)  # Output: [1, 4]