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Shiny example: Diamonds Explorer
library(shiny)
library(ggplot2)
dataset <- diamonds
ui <- pageWithSidebar(
headerPanel("Diamonds Explorer"),
sidebarPanel(
sliderInput('sampleSize', 'Sample Size',
min = 1, max = nrow(dataset),
value = min(1000, nrow(dataset)),
step = 500, round = 0),
selectInput('x', 'X', names(dataset)),
selectInput('y', 'Y', names(dataset), names(dataset)[[2]]),
selectInput('color', 'Color', c('None', names(dataset))),
checkboxInput('jitter', 'Jitter'),
checkboxInput('smooth', 'Smooth'),
selectInput('facet_row', 'Facet Row', c(None='.', names(dataset))),
selectInput('facet_col', 'Facet Column', c(None='.', names(dataset)))
),
mainPanel(
plotOutput('plot')
)
)
server <- function(input, output) {
dataset <- reactive({
diamonds[sample(nrow(diamonds), input$sampleSize), ]
})
output$plot <- renderPlot({
p <- ggplot(dataset(), aes_string(x = input$x, y = input$y)) +
geom_point()
if (input$color != 'None')
p <- p + aes_string(color=input$color)
facets <- paste(input$facet_row, '~', input$facet_col)
if (facets != '. ~ .')
p <- p + facet_grid(facets)
if (input$jitter)
p <- p + geom_jitter()
if (input$smooth)
p <- p + geom_smooth()
print(p)
}, height = 700)
}
shinyApp(ui, server)
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