Shiny App Presentation

Susan S.
October 21, 2015

Growth of Mobile Celluar Subscriptions per 100 of Population by Country

This project uses shiny to provide an HTML select box for users to select up to 10 countries to display on a graph. It reactively renders a ggplot graph each time a country is selected or deselected and uses the selectizeInput widget in shiny to create the select user interface.

App to display chart of Cell Phones per 100 of Population by Country
Data taken from Gapminder
Easily compare the growth of mobile cellular subscriptions in different countries

Code for Plot

ggplot(data = subset(tidycell, country %in% input$countries & year >= 1980), aes(x = year, y = CellPhonePer100, group = country, colour=country), na.rm=TRUE) +
      geom_line(na.rm=TRUE) + geom_point(na.rm=TRUE) +
      scale_x_discrete( 
        breaks = seq(1980, 2011, by = 5)) +
      ggtitle("Cell Phones Per 100 People") +
      theme(axis.text.x = element_text(angle=45)) + labs(color = "Country")

Sample Plot (Hardcoded Countries)

plot of chunk unnamed-chunk-2

Why This App?

R is good for exploratory data analysis. If you want to keep changing what you are looking at to see if you can spot patterns or trends, designing a slidify app can help you manually change your parameters. This app could be expanded to allow the user to select datasets for more exploration.