Developing Data Products Course Project III

Overview of Shiny Application

This Shiny application allows a user to learn the location of all the states of the United States of America. A user can select a state from a drop down list and that selected state is then displayed on a blank map in light pink.

How the Shiny Application Works

• The application is written in R as a Shiny Web App which is a web application framework
• The source code contains two separate files which are initilized upon creation of a Shiny Web App in R Studio: the server.R file and the ui.R file
• The server.R file contains the server logic for the application
• The ui.R file contains the logic for defining the user interface. This file makes use of the ‘sidebarLayout’ template
• The Shiny application uses the maps and mapdata libraries to display a map of the United States as well as populate the drop-down
• The application is hosted on R Studio’s cloud server for Shiny applications, Shinyapps.io

How to Use the Shiny Application

• Select a U.S. state from the drop down list
• The selected state is then displayed on the U.S. map and is filled in with a light pink color

R Code to Display U.S. Map

library(maps)
library(mapdata)
library(ggplot2)
states <- map_data("state")
ggplot(data = states) + geom_polygon(aes(x = long, y = lat, 
group = group), fill = "white", color = "black") + coord_fixed(1.5)

References

• The application is hosted here: https://cgrichardson.shinyapps.io/DDPproj3ShinyApp/
• My GitHub repository is located here: https://github.com/cgrichardson/DDPFinalCourseProject