Can we have a table displayed without applying any inputs

Thanks. Will check. can i use ! is.na(input$Date) in case for is not null?

any checking you do on input$Date has to account for it being more than 1 value being tested. so you will use functions like any(), or all() as in my example.
Here is a better version that deals with NA and NULL at the same time.
the shiny::isTruthy function which is False for values of FALSE,NA,NULL,0 etc.

if (any(!isTruthy(input$Date))) {
      df1 <- df[1:2, ]
    }

if the app is force closing, there will be an error to read about in your console
additional detail might be available by typing rlang::last_error() in your console.

it might also be a good idea for you to add a browser() statement just before code that you are suspicious of, so that you can step through line by line in debug mode to see what your code is doing when it errors. good luck

perfect and it is working. I am trying to add small message. If input$Date[2] > input$Date[1], it should show "Dates are not valid" in the DT table. Not sure if this is possible?

output$table <- renderTable({ 
if (input$Date[[2]] > input$Date[[1]])
   data.frame(WarningMessage = "Dates are not Valid", row.names = NULL)
else data2() 
})

thanks. Will try............

Thanks....But in DT table, when there is no data, we get a message telling "No data available". Can we move this towards left?

  1. Try to use selected="" in the selectInput., with ur existing code.

  2. Or use observeEvent with submit button

output$SUMMARY_GENERAL_table <- renderTable({
iris[1:2, ]
})
observeEvent (input$submit, {
table <- iris
if (input$Tic == "") {
table_display <- iris[1:2, ]
} else if (input$Tic == "ALL") {
table_display <- iris
} else {
table_display <- iris %>% filter(Species %in% input$Tic)
}

output$SUMMARY_GENERAL_table <- renderTable({
table_display
})
})