Create and Display the Structure of a Data Frame in R Programming

R Programming: Data frame Exercise-3 with Solution

Write a R program to get the structure of a given data frame.

Sample Solution :

R Programming Code :

# Create a data frame named 'exam_data' with four columns: 'name', 'score', 'attempts', and 'qualify'
exam_data = data.frame(
  # Define the 'name' column with a character vector of names
  name = c('Anastasia', 'Dima', 'Katherine', 'James', 'Emily', 'Michael', 'Matthew', 'Laura', 'Kevin', 'Jonas'),
  
  # Define the 'score' column with a numeric vector of scores
  score = c(12.5, 9, 16.5, 12, 9, 20, 14.5, 13.5, 8, 19),
  
  # Define the 'attempts' column with an integer vector of attempts
  attempts = c(1, 3, 2, 3, 2, 3, 1, 1, 2, 1),
  
  # Define the 'qualify' column with a character vector of qualification status
  qualify = c('yes', 'no', 'yes', 'no', 'no', 'yes', 'yes', 'no', 'no', 'yes')
)

# Print the label "Original dataframe:"
print("Original dataframe:")

# Print the data frame 'exam_data'
print(exam_data)

# Print the label "Structure of the said data frame:"
print("Structure of the said data frame:")

# Display the structure of the data frame 'exam_data'
print(str(exam_data))

Output:

[1] "Original dataframe:"
        name score attempts qualify
1  Anastasia  12.5        1     yes
2       Dima   9.0        3      no
3  Katherine  16.5        2     yes
4      James  12.0        3      no
5      Emily   9.0        2      no
6    Michael  20.0        3     yes
7    Matthew  14.5        1     yes
8      Laura  13.5        1      no
9      Kevin   8.0        2      no
10     Jonas  19.0        1     yes
[1] "Structure of the said data frame:"
'data.frame':	10 obs. of  4 variables:
 $ name    : chr  "Anastasia" "Dima" "Katherine" "James" ...
 $ score   : num  12.5 9 16.5 12 9 20 14.5 13.5 8 19
 $ attempts: num  1 3 2 3 2 3 1 1 2 1
 $ qualify : chr  "yes" "no" "yes" "no" ...
NULL             

Explanation:

• Create a data frame named exam_data:
  Uses the data.frame() function to create a data frame with four columns: name, score, attempts, and qualify.
• Define the name column:
  A character vector with names: 'Anastasia', 'Dima', 'Katherine', 'James', 'Emily', 'Michael', 'Matthew', 'Laura', 'Kevin', 'Jonas'.
• Define the score column:
  A numeric vector with scores: 12.5, 9, 16.5, 12, 9, 20, 14.5, 13.5, 8, 19.
• Define the attempts column:
  An integer vector indicating the number of attempts: 1, 3, 2, 3, 2, 3, 1, 1, 2, 1.
• Define the qualify column:
  A character vector indicating qualification status: 'yes', 'no', 'yes', 'no', 'no', 'yes', 'yes', 'no', 'no', 'yes'.
• Print the label "Original dataframe:":
  Displays the text "Original dataframe:" to indicate the start of the data frame output.
• Print the data frame exam_data:
  Displays the entire data frame created, showing all rows and columns.
• Print the label "Structure of the said data frame:":
  Displays the text "Structure of the said data frame:" to indicate the structure output.
• Display the structure of the data frame:
  Uses the str() function to display the internal structure of the data frame, including data types and column contents.

R Programming Code Editor:

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