R Programming: Drop column(s) by name from a given data frame

R Programming: Data frame Exercise-10 with Solution

Write a R program to drop column(s) by name from a given data frame.

Sample Solution :

R Programming Code :

exam_data = data.frame(
name = c('Anastasia', 'Dima', 'Katherine', 'James', 'Emily', 'Michael', 'Matthew', 'Laura', 'Kevin', 'Jonas'),
score = c(12.5, 9, 16.5, 12, 9, 20, 14.5, 13.5, 8, 19),
attempts = c(1, 3, 2, 3, 2, 3, 1, 1, 2, 1),
qualify = c('yes', 'no', 'yes', 'no', 'no', 'yes', 'yes', 'no', 'no', 'yes')
)
print("Original dataframe:")
print(exam_data)
exam_data = subset(exam_data, select = -c(name, qualify))
print(exam_data)

Sample 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
   score attempts
1   12.5        1
2    9.0        3
3   16.5        2
4   12.0        3
5    9.0        2
6   20.0        3
7   14.5        1
8   13.5        1
9    8.0        2
10  19.0        1                      

R Programming Code Editor:

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