R Programming Fundamental

How do you access the help documentation for the mean function in R?

How do you assign the value 25 to a variable named `age` in R?

Given a vector v <- c(10, 20, 30, 40, 50)

how do you select the 3rd element?

What is the result of code below

v <- c(1, 2, 3)

v * 2

• 2, 4, 6

• 1, 2, 3, 4, 5, 6

• 3, 6, 9

• 4, 5, 6

Fill the gap to create a data frame

with columns `Name` and `Age`

What does the pipe operator (%>%) do in dplyr?

• Passes the output of one function to the input of the next function

• Concatenates strings together

• Combines two data frames by columns

• Filters rows in a data frame

How do you select the `Age` column from a data frame `df` using dplyr?

How do you filter rows where

Age is greater than 25

in a data frame `df` using dplyr?

How do you arrange the data frame df in descending order of Height using dplyr?

• arrange(df, desc(Height))

• arrange(df, Height)

• order(df, Height)

• order(df, -Height)

Complete 1, 2, 3 text boxes in order to group a data frame `df` by Genotype and calculate the mean of `Height`?

(use common to separate ", " for answer)
___, ___, ___