R Programming: List with a Vector, Matrix, and Named Elements

R Programming: List Exercise-2 with Solution

Write a R program to list containing a vector, a matrix and a list and give names to the elements in the list.

Sample Solution :

R Programming Code :

# Create a list containing a vector, a matrix, and another list
list_data <- list(c("Red", "Green", "Black"),     # Vector of color names
                  matrix(c(1,3,5,7,9,11), nrow = 2),  # 2x3 matrix of odd numbers
                  list("Python", "PHP", "Java"))      # List of programming languages

# Print the original list
print("List:")
print(list_data)

# Assign names to the elements in the list
names(list_data) = c("Color", "Odd numbers", "Language(s)")

# Print the list with the assigned column names
print("List with column names:")
print(list_data)

Output:

[1] "List:"
[[1]]
[1] "Red"   "Green" "Black"

[[2]]
     [,1] [,2] [,3]
[1,]    1    5    9
[2,]    3    7   11

[[3]]
[[3]][[1]]
[1] "Python"

[[3]][[2]]
[1] "PHP"

[[3]][[3]]
[1] "Java"


[1] "List with column names:"
$Color
[1] "Red"   "Green" "Black"

$`Odd numbers`
     [,1] [,2] [,3]
[1,]    1    5    9
[2,]    3    7   11

$`Language(s)`
$`Language(s)`[[1]]
[1] "Python"

$`Language(s)`[[2]]
[1] "PHP"

$`Language(s)`[[3]]
[1] "Java"                         

Explanation:

• list_data <- list(c("Red","Green","Black"), matrix(c(1,3,5,7,9,11), nrow = 2), list("Python", "PHP", "Java")):
• Creates a list called list_data containing three elements:
• A vector with three color names: "Red", "Green", "Black".
• A 2x3 matrix of odd numbers: 1, 3, 5, 7, 9, 11.
• A list of programming languages: "Python", "PHP", "Java".
• print("List:"):
• Prints the label "List:".
• print(list_data):
• Prints the contents of the list_data list, displaying the vector, matrix, and list.
• names(list_data) = c("Color", "Odd numbers", "Language(s)"):
• Assigns names to the elements of the list_data list:
• "Color" for the color vector.
• "Odd numbers" for the matrix of odd numbers.
• "Language(s)" for the list of programming languages.

print("List with column names:"):
Prints the label "List with column names:".
print(list_data):
Prints the list with the newly assigned element names for better readability.

R Programming Code Editor:

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