49 lines
1.4 KiB
R
49 lines
1.4 KiB
R
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# modified from https://shiny.rstudio.com/articles/progress.html
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# This app has a custom format string
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library(cli)
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# !!! You don't need these in real code.
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# cli.progress_show_after makes sure that we see the progress bar from
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# the beginning, not only after a delay.
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options(cli.progress_show_after = 0)
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# !!! You don't need these in real code.
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# This also requests logging the progress bar to the standard output,
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# in the console.
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options(cli.progress_handlers_only = c("shiny", "logger"))
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server <- function(input, output) {
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output$plot <- renderPlot({
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input$goPlot # Re-run when button is clicked
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# Create 0-row data frame which will be used to store data
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dat <- data.frame(x = numeric(0), y = numeric(0))
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# Number of times we'll go through the loop
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n <- 10
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cli_progress_bar(total = n, "Rendering plot", format = "Starting part {i}")
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for (i in 1:n) {
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# Each time through the loop, add another row of data. This is
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# a stand-in for a long-running computation.
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dat <- rbind(dat, data.frame(x = rnorm(1), y = rnorm(1)))
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cli_progress_update()
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# Pause for 0.1 seconds to simulate a long computation.
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Sys.sleep(0.5)
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}
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plot(dat$x, dat$y)
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})
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}
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ui <- shinyUI(basicPage(
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plotOutput('plot', width = "300px", height = "300px"),
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actionButton('goPlot', 'Go plot')
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))
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shinyApp(ui = ui, server = server)
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