renderPrint in interactive shiny document does not work properly

[pieterjanvc]

Hi,

First of all, it's best to create a minimal reproducible example when having issues as your code is missing some parts to run it.

Shiny debugging and reprex guide

Shiny issues can be challenging to resolve relative to other problems with your code or statistical methods. Shiny apps are often large, complex projects with interacting files. When seeking help from others it is considered polite to: First, do your best to work through RStudio's debugging tools to diagnose your issue on your own. Often those shiny logs and tracebacks are useful to others trying to help out. Second, strive to minimize the effort required to replicate your issue. You can do this with a reproducible example ("reprex"). Shiny Debugging Errors in Shiny code can be difficult to track down. If you don't know where your problem is coming from, you can track it down with some o…

Second, you are trying to output a plot in a renderPrint statement. This doesn't make much sense to me... can you explain the purpose of this? Is it the values you're trying to print?

This is an example:

library(shiny)

ui <- fluidPage(
  actionButton("run", "Run again"),
  plotOutput("myPlot"),
  textOutput("myText")
)

server <- function(input, output, session) {
  
  myData = reactive({
    input$run
    rnorm(100)
  })
  
  output$myPlot = renderPlot({
    hist(myData())
  })
  
  output$myText = renderPrint({
    myData()
  })
}

shinyApp(ui, server)

Hope this helps,
PJ