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?

Many functions in R have default values for some of their arguments. This means if you omit this argument in your function call, R will automatically use the default value. The sort() function can be used to sort the elements of a vector. Check the help page for this function and determine whether the default sort order is increasing or decreasing.

Consider the following data frame in R, named mydf:

What would the result of the following command be?

What is the output of the following command?

You execute the command

in R. The resulting output is

A matrix in R is simply an atomic vector with a dimension attribute.

How would you determine the length of a vector named my_vector in R?

Which of the following functions can be used to launch help pages in R?