R Programming - Assign NULL to a given list elements

Last update on December 21 2024 10:08:34 (UTC/GMT +8 hours)

Write a R program to assign NULL to a given list element.

Sample Solution :

R Programming Code :

# Create a list with five elements
l = list(1, 2, 3, 4, 5)

# Print the original list
print("Original list:")
print(l)

# Print message indicating the modification
print("Set 2nd and 3rd elements to NULL")

# Set the 2nd element of the list to NULL
l[2] = list(NULL)

# Set the 3rd element of the list to NULL
l[3] = list(NULL)

# Print the modified list
print(l)

Output:

[1] "Original list:"
[[1]]
[1] 1

[[2]]
[1] 2

[[3]]
[1] 3

[[4]]
[1] 4

[[5]]
[1] 5

[1] "Set 2nd and 3rd elements to NULL"
[[1]]
[1] 1

[[2]]
NULL

[[3]]
NULL

[[4]]
[1] 4

[[5]]
[1] 5                         

Explanation:

• Create a list: l = list(1, 2, 3, 4, 5)
• This line creates a list l containing five elements: 1, 2, 3, 4, and 5.
• Print the original list: print("Original list:")
• Prints the label "Original list:" to indicate that the following output is the original list.
• Display the original list: print(l)
• Displays the contents of the list l before any modifications.
• Print modification message: print("Set 2nd and 3rd elements to NULL")
• Prints the label "Set 2nd and 3rd elements to NULL" to indicate that the following changes are being made to the list.
• Set 2nd element to NULL: l[2] = list(NULL)
• Sets the 2nd element of the list l to NULL.
• Set 3rd element to NULL: l[3] = list(NULL)
• Sets the 3rd element of the list l to NULL.
• Print the modified list: print(l)
• Displays the contents of the list l after the modifications, showing that the 2nd and 3rd elements have been replaced with NULL.

R Programming Code Editor:

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