Basics of building Shiny apps in R

Santa Barbara R-Ladies meetup (2019-10-30)

Allison Horst

Objectives:

• Introduce general Shiny structure (ui + server)
• Create widgets for user selection
• Understand basics of reactivity (reactive inputs & rendered outputs)
• Build a reactive app

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Requirements & Materials

• Slides for this session

• Teaching key for this session

• Required R packages:

  • tidyverse
  • shiny
  • shinythemes

• Data:

  • spooky_data.csv

Data in spooky_data.csv are curated from two sources:

1. Candy Store (candystore.com) data for 2019 candy sales by state.
2. Costume rankings by state (2017) from Google Frightgeist

Other resources

• Mastering Shiny (in development) by Hadley Wickham
• Introduction to Building a Shiny app by Dean Attali
• Many useful tutorials and examples: https://shiny.rstudio.com/tutorial/
• Cool examples of what you can do with Shiny: https://shiny.rstudio.com/gallery/
• Click here for different widget options