> set.seed(10)
> x <- rbinom(100, 1, 0.5)
> str(x)A. int [1:100] 1 0 0 1 0 0 0 0 1 0 ...
B. int [1:100] 10 0 01 1 0 0 01 0 1 0 ...
C. int [1:100] 1 03 0 1 0 0 0 02 1 0 ...
D. int [1:100] 1 2 3 1 1 0 0 0 1 0 ...
Answer: Option A
This Question Belongs to R Programming >> Data Manipulation With Dplyr
In dplyr, what function is used to select specific columns from a data frame?
A. select_cols()
B. choose_cols()
C. select()
D. pick()
How do you filter rows in a dplyr data frame based on a specific condition using filter()?
A. filter_rows()
B. row_filter()
C. filter_conditions()
D. filter()
In dplyr, what does the arrange() function do?
A. Sorts the data frame in ascending order
B. Arranges the columns in a specified order
C. Orders the rows based on a specific column
D. Sorts the data frame in descending order
What function is used to create a new variable in a dplyr data frame based on existing variables?
A. create_var()
B. mutate()
C. new_variable()
D. add_column()
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