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Data Science / Datawetenskap - 141
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A data frame is a rectangular collection of values, usually organised so that variables appear in the columns and observations appear in rows.
Which of the following functions can be used to determine what the current working directory in an R session is?
Consider the following data frame in R, named mydf:
What would the result of the following command be?
The mtcars object in R is a data frame.
What is the output of the following command?
The commands
and
in R will produce exactly the same output.
In R, NA means "not available" and is used to indicate missing values.
Logical vectors in R can only contain the values TRUE and FALSE.
What is the output of the following command?