R in 3 Months Week 7 (Functions)

Agenda

1. Housekeeping

2. Question on Function Arguments

3. Functions

4. Next Week

https://rin3spring2025.rfortherestofus.com/slides/slides-week-07.html

Housekeeping

• Join Discord if you haven’t and are interested!

Question on Function Arguments

I’m seeing a difference in the syntax used in the main video vs the solution video and am wondering if you can please explain the difference. In the main video, you use separate_longer_delim(cols = activities,... but the solution video uses separate_longer_delim(partyid,... without the use of cols =.

https://rfortherestofus.com/courses/r-in-3-months-spring-2025/lessons/tidy-data-rule-2-every-row-is-an-observation

https://rfortherestofus.com/courses/r-in-3-months-spring-2025/lessons/using-function-arguments

Functions

Functions as Recipes

• Print quantities
• Make function
• Explain how last item in function is returned
• Explain how objects created in function don’t exist in global environment
• Show how to add argument to function to calculate number of cookies

Next Week

• Course lessons cover data merging and data exporting

• Project assignment is to tidy your data with the various functions you have learned