Data Reshaping and R Functions Quiz

In the context of the tidyverse, what does the filter() function do?

• a) Create a subset of rows based on conditions

• b) Perform element-wise operations

• c) Merge datasets based on common variables

• d) Generate summary statistics for variables

Find ID for the Chinstrap penguin with shortest bill length

• a) 33

• b) 296

• c) 132

• d) 98

Which penguin species has the highest average body mass in the penguins dataset?

• a) Adelie

• b) Gentoo

• c) Chinstrap

• d) It varies between species

In the context of data reshaping, what does the pivot_longer() function do in the tidyverse?

• a) Transforms data from long to wide format

• b) Transforms data from wide to long format

• c) Filters rows based on conditions

• d) Performs group-wise operations

What function in R is used to save the entire workspace, including all variables and functions, for later use?

• a) saveRDS()

• b) write.csv()

• c) save.image()

• d) save()

What is the purpose of the pivot_wider() function in the tidyr package?

• a) Transpose data from long to wide format

• b) Transpose data from wide to long format

• c) Combine multiple datasets into a single dataset

• d) Perform row-wise operations on data

In the context of the tidyverse, what does the group_by() function do?

• a) Filter rows based on conditions

• b) Compute summary statistics for variables within groups

• c) Merge datasets based on common variables

• d) Reorder rows based on specific variables