Q84
Point out the correct statement?
A.
There are three operators that can be used to extract subsets of R objects
AnswerB.
The [ operator is used to extract elements of a list or data frame by literal name
C.
The [[ operator is used to extract elements of a list or data frame by string name
D.
There are five operators that can be used to extract subsets of R objects
Answer: Option A
Solution
Answer: Option A
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