Previous Code Club sessions

Modified

September 29, 2025

Want to do some self-study?

Ask us for access to the Zoom recordings of previous Code Club sessions!

Current semester

Session Date Presenter Topic & link
S10E01 Sep 08 Horacio Reproducibility 1: Quarto I
S10E02 Sep 15 Horacio Reproducibility 2: Quarto II
S10E03 Sep 22 Jelmer Reproducibility 3: File Organization and RStudio Projects
S10E04 Sep 29 Jelmer Reproducibility 4: Code Structuring
S10E05 Oct 06 Horacio Reproducibility 5: Code Styling


Previous semesters

Spring ’25

Session Date Presenter Topic & link
S09E01 Jan 14 Jess Data visualization with ggplot2 – I
S09E02 Jan 21 Horacio Data visualization with ggplot2 – II
S09E03 Jan 28 Jess Data visualization with ggplot2 – III
S09E04 Feb 04 Jess Data visualization with ggplot2 – IV
S09E05 Feb 18 Jelmer Making maps in R – I
S09E06 Feb 25 Jelmer Making maps in R – II
S09E07 Mar 04 Jelmer Making maps in R – III
- Mar 11 - No Code Club (Spring Break)
S09E08 Mar 18 Jess Iteration I - for loops
S09E09 Mar 25 Jess Iteration II - writing functions and applying them with purrr:map()
S09E10 Apr 01 Jelmer Iteration III: purrr:map()
S09E11 Apr 08 Horacio Creating pretty tables with gt – I
S09E12 Apr 15 Horacio Creating pretty tables with gt – II
S09E13 Apr 22 Horacio Creating pretty tables with gt – III


Fall ’24

Session Date Presenter Link
S08E01 Aug 26 Jess Data wrangling 01: Filtering rows
S08E02 Sept 9 Jess Data wrangling 02: Selecting columns, sorting, and mutate()
S08E03 Sept 16 Jelmer Data wrangling 03: Counting and summarzing by group
S08E04 Sept 23 Horacio Data wrangling 04: Merging/joining data frames
S08E05 Sept 30 Horacio Data wrangling 05: Pivoting with pivot_longer()
S08E06 Oct 7 Horacio Data wrangling 06: Pivoting with pivot_wider()
S08E07 Oct 14 Jelmer Reproducibility 01: File and project management and organization
S08E08 Oct 21 Horacio Reproducibility 02: Quarto 1
S08E08 Oct 28 Jess Reproducibility 03: Quarto 2
S08E09 Nov 4 Jess Reproducibility 04: Github 1
S08E10 Nov 18 Jess Reproducibility 05: Github 2
S08E11 Dec 2 Jelmer R at the Ohio Supercomputer Center


Spring ’24

Session Date Presenter Link
S07E01 Jan 12 Jess R Basics 1: R, RStudio, and RStudio Projects
S07E02 Jan 19 Jelmer R Basics 2: Scripts and objects
S07E03 Jan 26 Horacio R Basics 3: Built-in functions, vectors, and help
S07E04 Feb 02 Jess R Basics 4: Vectorized operations and data frames
S07E05 Feb 09 Horacio R Basics 5: Data manipulation in base R
S07E06 Feb 16 Jess Tidyverse 1: An introduction to the tidyverse
S07E07 Feb 23 Jelmer Tidyverse 2: More basic data wrangling
S07E08 Mar 01 Jelmer Tidyverse 3: Grouping and summarizing data
S07E09 Mar 08 Aaron Wiedemer Tidyverse 4: Tidy data and pivot functions
S07E10 Mar 22 Jess Tidyverse 4: Data import
S07E11 Mar 29 Jelmer Plotting 1: Intro to ggplot2
S07E12 Apr 05 Horacio Plotting 2: Aesthetics, violin, and boxplots
S07E13 Apr 12 Horacio Plotting 3: Histogram, density, and bar plots
S07E14 Apr 19 Jelmer Plotting 4: Faceting, formatting, and saving plots


Fall ’23

Session Date Presenter Link
S06E01 Aug 28 Jess Quarto Website 1: Initiating a website
S06E02 Sep 11 Jelmer Quarto Website 2: Adding a page & YAML formatting
S06E03 Sep 18 Jess Quarto Website 3: Deploying to GitHub
S06E04 Sep 25 Jelmer Quarto Website 4: Interacting with your repository
S06E05 Oct 2 Jess Quarto Website 5: Modifying your site
S06E06 Oct 9 Jelmer Quarto Website 6: Quarto features
S06E07 Oct 16 Jess Quarto Website 7: Quarto presentations
S06E08 Oct 30 Horacio Shiny Apps 01: Intro to Shiny
S06E09 Nov 06 Horacio Shiny Apps 02: Intro to Shiny (cont.)
S06E10 Nov 13 Horacio & Sandip Shiny Apps 03: Map viz. in Shiny
S06E10 Dec 04 Horacio Shiny Apps 04: Deploying our Shiny App


Spring ’23

Session Date Presenter Topic + link to BioDASH page
S05E01 Jan 26 Jelmer R4DS, Ch. 4: Pipes
S05E02 Feb 02 Stephen R4DS, Ch. 6: Tidy Data, I
S05E03 Feb 09 Jessica & Daniel R4DS, Ch. 6: Tidy Data, II
S05E04 Feb 16 Michael R4DS, Ch. 7: Code Style
S05E05 Feb 23 Jelmer R4DS, Ch. 8: Data Import, I
S05E06 Mar 02 Stephen R4DS, Ch. 8: Data Import, II
S05E07 Mar 09 Jessica R4DS, Ch. 9: Scripts & Projects
S05E08 Mar 23 Jessica R4DS, Ch. 10: ggplot layers, part 1
S05E09 Mar 30 Jelmer R4DS, Ch. 10: ggplot layers, part 2


Summer & Fall ’22

Session Date Presenter Topic
S04E01 June 09 Jelmer R4DS, Ch. 1: Intro
S04E02 June 23 Michael B. R4DS, Ch. 3.1- 3.4: Data viz I
S04E03 June 30 Jessica R4DS, Ch. 3.5: Data viz II
S04E04 July 07 Jessica R4DS, Ch. 3.6: Data viz III
S04E05 July 14 Mike S. R4DS, Ch. 3.7: Data viz IV
S04E06 July 21 Jelmer R4DS, Ch. 3.8-3.10: Data viz V
S04E07 July 28 Michael B. R4DS, Ch. 27: R Markdown
S04E08 Sept 15 Jessica R4DS, Ch. 4, 6 & 8: Workflow
S04E09 Sept 22 Jelmer R4DS, Ch. 5.1-5.2: Data transformation I - intro and filter()
S04E10 Oct 06 Michael B. R4DS, Ch. 5.3: Data transformation II - arrange()
S04E11 Oct 20 Michael B. R4DS, Ch. 5.4: Data transformation III - select()
S04E12 Oct 27 Stephen R4DS, Ch. 5.5: Data transformation IV - mutate()
S04E13 Nov 03 Mike S. R4DS, Ch. 5.6: Data transformation V - summarize() part 1
S04E14 Nov 10 Jessica R4DS, Ch. 5.6: Data transformation V - summarize() part 2
S04E15 Nov 17 Jelmer R4DS, Ch. 7.1-7.3: Exploratory Data Analysis I
S04E16 Dec 01 Jelmer R4DS, Ch. 7.1-7.3: Exploratory Data Analysis II
S04E17 Dec 08 Michael B. R4DS, Ch. 10: Tibbles


Spring ’22

Session Date Presenter Topic (+ link) Topic block
S03E01 Jan 13 Mike S. T-tests Basic statistics in R
S03E02 Jan 20 Jessica ANOVA Basic statistics in R
S03E03 Jan 27 Jelmer Principal Component Analysis Basic statistics in R
S03E04 Feb 03 Jessica ANOVA part II Basic statistics in R
S03E05 Feb 10 Stephen Correlation Basic statistics in R
S03E06 Feb 17 Michael B. Data structures and subsetting Basic statistics in R
S03E07 Feb 24 Jelmer Intro to “DRY” and iteration “Don’t repeat yourself”
S03E08 Mar 03 Jelmer Loops “Don’t repeat yourself”
S03E09 Mar 10 Mike S. Apply functions “Don’t repeat yourself”
S03E10 Mar 24 Mike S. Purrr map functions “Don’t repeat yourself”
S03E11 Apr 14 Michael B. Writing functions part I “Don’t repeat yourself”
S03E12 Apr 21 Michael B. Incorporating your own functions in loops “Don’t repeat yourself”


Fall ’21

Session Date Presenter Topic (+ link) Topic block
S02E01 Aug 26 Jelmer R basics – part I R basics
S02E02 Sep 2 Mike S. R basics – part II R basics
S02E03 Sep 9 Michael B. R Markdown R basics
S02E04 Sep 16 Jessica Tidyverse intro – part I R basics
S02E05 Sep 23 Stephen Tidyverse intro – part II R basics
S02E06 Sep 30 Michael B. ggplot intro – part I Plotting in R
S02E07 Oct 07 Jelmer ggplot intro – part II Plotting in R
S02E08 Oct 21 Mike S. Faceting plots Plotting in R
S02E09 Oct 28 Mike S. Faceting and combining plots Plotting in R
S02E10 Nov 04 Daniel Moreno Statistical results in plots with ggpubr Plotting in R
S02E11 Nov 18 Julia Vrtilek Bat vocalizations with R at OSC Putting code to practice
S02E12 Dec 02 Matthew Teegarden Interactive applications with Shiny Putting code to practice
S02E13 Dec 09 Jessica Interactive plots with Plotly Plotting in R


Fall ’20 & Spring ’21

Session nr. Date Presenter Topic (+ link) Other
S01E01 Nov 18 Jelmer RStudio Projects & getting started slides
S01E02 Dec 2 Jessica dplyr core verbs
S01E03 Dec 9 Mike S. Joining datasets
S01E04 Dec 16 Michael B. ggplot2 – round 1
S01E05 Jan 15 Jessica ggplot2 – round 2
S01E06 Jan 22 Stephen Factors
S01E07 Jan 29 Jelmer R Markdown
S01E08 Feb 5 Mike S. Pivoting data
S01E09 Feb 12 Michael B. Subsetting data
S01E10 Feb 19 Jessica Faceting, animating, and combining plots
S01E11 Feb 26 Stephen Making maps with ggmap
S01E12 Mar 5 Jelmer Vectorization and loops
S01E13 Mar 12 Mike S. The apply family of functions
S01E14 Mar 19 Michael B. Writing your own functions
S01E15 Mar 26 Jessica Interactive plots with Plotly
S01E16 Apr 02 Stephen Working with dates with lubridate
S01E17 Apr 09 Jelmer *Introduction to regular expressions
S01E18 Apr 16 Mike S. Regular Expressions: Part II
S01E19 Apr 23 Michael B. Word Clouds via tidytext
S01E20 Apr 30 Jessica Cleaning up variables names
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