Thank you for replying me!!
Your soluiton sounds very useful! (I'm new to R)
Can I make sure if I really understand what you said?
You mean the r-script I have created, it don't have to name: helper.r,
instead, normally it would be named:global.R ,right?
And what does this means?
(i.e. you *don't* have to use source ) .
Is it means that I don't have to write library again in the ui.r and server.r?
(Actually , I'm not very sure about what source means in R or R-shiny)