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Shiny Old Faithful Geyser example with magrittr pipes
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# | |
# This is a Shiny web application. You can run the application by clicking | |
# the 'Run App' button above. | |
# | |
# Find out more about building applications with Shiny here: | |
# | |
# http://shiny.rstudio.com/ | |
# | |
library(shiny) | |
library(magrittr) | |
# Application title | |
title <- "Old Faithful Geyser Data" %>% | |
titlePanel() | |
# Sidebar with a slider input for number of bins | |
side <- sliderInput("bins", | |
"Number of bins:", | |
min = 1, | |
max = 50, | |
value = 30) %>% | |
sidebarPanel() | |
# Show a plot of the generated distribution | |
main <- plotOutput("distPlot") %>% | |
mainPanel() | |
# Combine sidebar and main panels into layout | |
layout <- sidebarLayout(side, | |
main) | |
# Define UI for application that draws a histogram | |
ui <- fluidPage(title, | |
layout) | |
# Define server logic required to draw a histogram | |
server <- function(input, output) { | |
output$distPlot <- renderPlot({ | |
# Generate bins based on input$bins from ui.R | |
bins <- input$bins + 1 | |
# Draw the histogram with the specified number of bins | |
faithful[, 2] %>% | |
hist(breaks = seq(min(.), | |
max(.), | |
length.out = bins), | |
col = 'darkgray', | |
border = 'white') | |
}) | |
} | |
# Run the application | |
shinyApp(ui = ui, | |
server = server) | |
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Whenever someone starts a new Shiny app in RStudio, they are greeted with the "Old Faithful" example.
I decided to work the example using magrittr pipes (%>%) where I could.
I think this method makes the code more readable, which in turn will make it easier to manage as the app grows larger.
Next time you make a Shiny app, give this method a try and let me know how it works for you.