CODEWITHSUNDEEP
rshiny
NellieG
NellieG

Reputation: 93

Getting a FALSE message at the bottom of my Rshiny output

I'm very new to Rshiny. I've written this code:

ui=source('./www/uixx2.R')

server = function(input,output){}

shinyApp(ui = ui, server = server)

The uixx2.R file is placed in the subdirectory www and the code is:

ui=shinyUI("Why am i getting:  ")

The output is: Why am i getting: FALSE

I keep getting FALSE at the bottom of my output everytime I use the source function.

Upvotes: 1

Views: 151

Answers (2)

stevec
stevec

Reputation: 52268

I would highly recommend the following: In RStudio, go to file -> New file -> Shiny Web App

That way, it will automatically set up a structure for you and make it hard to go wrong

But to answer the question, your ui can be a function, like so

ui <- source('./www/uixx2.R')[[1]] # This takes the first list item (i.e. the function - see below)

server = function(input,output){}

shinyApp(ui = ui, server = server)

# In uixx2.R, simply put:

function() {
  shinyUI("Why am i getting: ")
  # Anything else goes here ...
}

enter image description here

Upvotes: 1

Shamis
Shamis

Reputation: 2604

You are assigning to the ui variable twice. The line ui = source('./www/uixx2.R') is creating the error, since the ui becomes a list of the sourced code and FALSE, which then shiny displays. Check it in the variable viewer.

Generally the source("file.R") should not be used to assign to a variable since it has no defined return value. (or at least in the usual ? help it doesn't say anything)

This one works.

source('./www/uixx2.R')    
server = function(input,output){}    
shinyApp(ui = ui, server = server)

The uixx2.R file is placed in the subdirectory www and the code is:    
ui=shinyUI("Why am i getting:  ")

Upvotes: 3

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