r - need to input data into a textbox in shiny -


i making simple system in shiny consist in textbox , number of checkboxes below it. want user enters id textbox , automatically system generates text file name of file same user id. mean if user enters "1234q" id, system generate file named "1234q". far have done following:

#part of ui.r file library(shiny) shinyui(fluidpage(   titlepanel(h2("title")),   ###textbox entering person data   textinput("text2", label = h3("personal id"), value = ""),   verbatimtextoutput("textboxvalue"),   hr(),     mainpanel(     textoutput("text1"),     #some checkboxes here     actionbutton("action", label = "next")     ) ))

and server.r following:

sw=0 shinyserver(function(input, output, session) {   output$textboxvalue <- renderprint({ input$text2 })   observe({       filenamedata<-rendertext({ input$text2 })       filename<<-paste(filenamedata(),sep=".","txt")   })   if (sw==0){     #some operations here     cat(somedata,file=filename,append=true,sep=",") #save data

the problem have after user inputs id got data filename variable, intend use saving data obtain after if(sw==0) part, nothing happens. see program bypasses observe part , goes directly evaluate if(sw==0) part. have tried using isolate , no luck @ all. can solve this?

update:

i have done following:

shinyserver(function(input, output, session) {   ###data received textbox, need save file name once    ####observe   observe({     filenamedata<-rendertext({ input$text2 })     #print(filenamedata())       filename<<-paste(filenamedata(),sep=".","txt")   }) isolate({      ###end of data received textbox   if (sw==0){

which works fine, missing first data enter because filename empty.

pd. in summary need value of text user inputs textfield , create file same name. process should made once.

if want link execution of if(sw==0{...} 'input$text2, isolate way go. need wrap if .. in isolate, , have inside observer trigger it. should work

observe({    filenamedata<-rendertext({ input$text2 })    filename<<-paste(filenamedata(),sep=".","txt")     isolate ({       if (sw==0){            #some operations here            cat(somedata,file=filename,append=true,sep=",") #save data        }     })  })

now isolate() inside of observer , should trigger when input$text2 changes.


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