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library(shiny)
# Define server logic for random distribution application
function(input, output) {
# Reactive expression to generate the requested distribution.
# This is called whenever the inputs change. The output
# functions defined below then all use the value computed from
# this expression
data <- reactive({
dist <- switch(input$dist,
norm = rnorm,
unif = runif,
lnorm = rlnorm,
exp = rexp,
rnorm)
dist(input$n)
})
# Generate a plot of the data. Also uses the inputs to build
# the plot label. Note that the dependencies on both the inputs
# and the data reactive expression are both tracked, and
# all expressions are called in the sequence implied by the
# dependency graph
output$plot <- renderPlot({
dist <- input$dist
n <- input$n
hist(data(),
main=paste('r', dist, '(', n, ')', sep=''))
})
# Generate a summary of the data
output$summary <- renderPrint({
summary(data())
})
# Generate an HTML table view of the data
output$table <- renderTable({
data.frame(x=data())
})
}
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