______ let’s you perform SQL queries on your R data frames.
A. sqldf
B. plyr
C. forecast
D. All of the mentioned
Answer:A
______ let’s you perform SQL queries on your R data frames.
A. sqldf B. plyr C. forecast D. All of the mentioned
Explanation:sqldf uses SQLite syntax. 2. ______ splits a data frame and results an array (hence the da). Hopefully you’re getting the idea here.