CSCI E-5a: Introduction to Programming with R

Fall 2025

http://jrsacher.github.io/e5a

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Sections

• Tidying Data
• Applying Functions
• Transforming Data
• Representing Data
• General Information

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Tidying Data

Slides

Example files

Topics

• R pipe operator
• Installing and using packages
• The Tidyverse

Tidyverse Resources

Tidyverse packages

“Cheat sheets” for

• dplyr
• tidyr
• stringr

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Applying Functions

Slides

Example files

Topics

• Functions
• Variable scope
• Loops
• apply
• Functional programming

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Transforming Data

Slides

Example files

General

• Grades released for Check 1
  • Reminder: 2/3 is a good answer; 3/3 is a “bonus point”
• Will start grading Problem Set 1 shortly
  • Your assigned TF will grade your assignment
• Questions, comments, or concerns?

Topics

• Logical operators and expressions
• Conditionals
• Subsetting data
• Combining data

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Representing Data

Slides

Example files)

General

• Read the syllabus!
• Questions, comments, or concerns?

Topics

• Background/logistics
• R basics
• Creating files
• Functions
• Data types/structures
• Working with strings
• Vectors and Data frames
• Reading/writing data files

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General Information

Course Website

Contact Josh. Other staff info can be found here.

Sections (feel free to attend whichever is convenient):

• Zoom link – the same for all sections
• Tuesdays 6:00 PM - 7:30 PM ET with X
• Wednesdays 6:00 PM - 7:30 PM ET with Y

Office hours:

• Zoom link – the same for all office hours
• Mondays 6:00 PM - 7:30 PM ET with A
• Thursdays 6:00 PM - 7:30 PM ET with B
• Potentially by appointment – email Josh

Discussion forum – please post questions here first!