Underline value

Question

What is the underscore function in R? For example, the following code string: ; determines that the currently displayed data is placed in a variable ; however, if I change it to , all filtered data will be placed in a variable .input$tbl_rows_currentfiltered_datainput$tbl_rows_allfiltered data

I understand how it functions here, but what is its general use?

ui = fluidPage(dataTableOutput('tbl'),
           plotOutput('plot1')
)

server = function(input, output) {   
 output$tbl = renderDataTable({
    datatable(KSI, filter="top",rownames=TRUE,options = list(lengthChange = FALSE))
})
output$plot1 = renderPlot({  
   filtered_data <- as.numeric(*input$tbl_rows_current*)     
   print(filtered_data)   
 })
}  
shinyApp(ui=ui, server=server)

Answer 1

, . ( _ <- .) tbl_rows_current tbl_rows_all - input.

• tblrowscurrent tblrowsall
• tblrowscurrent tblrowsall
• tbl.rows.current tbl.rows.all
• oranges jackhammers

, - R?

, , ; . , - API/, (.. ).