Which of the following return a subset of the columns of a data frame ?
A. select
B. retrieve
C. get
D. All of the mentioned
Answer:A
Which of the following return a subset of the columns of a data frame ?
A. select B. retrieve C. get D. All of the mentioned
Explanation:One important contribution of the dplyr package is that it provides a “grammar” for data manipulation and for operating on data frames. 2. Point out the correct statement :