Building R package “no visible global function definition for” shiny functions

3
votes

Im trying to check my own package with 

Rcmd.exe check dbt.ORA_1.0.tar.gz.

despite of adding "Depends: shiny in the Description file,

I get alot of warnings like this:

...

  • dbtORA: no visible global function definition for 'runApp'
  • dbtORA: no visible global function definition for 'fluidPage'
  • dbtORA: no visibleglobal function definition for 'titlePanel'
  • dbtORA: no visible global function definition for 'sidebarLayout'
  • dbtORA: no visible global function definition for 'sidebarPanel'
  • dbtORA: no visible global function definition for 'selectInput'
  • dbtORA: no visible global function definition for 'checkboxInput'
  • dbtORA: no visible global function definition for 'conditionalPanel'
  • dbtORA: no visible global function definition for 'numericInput'
  • dbtORA: no visible global function definition for 'actionButton'
  • dbtORA: no visible global function definition for 'mainPanel'
  • dbtORA: no visible global function definition for 'textOutput'
  • dbtORA: no visible global function definition for 'uiOutput'

...

the function dbtORA is very long, the source code is like this:

dbtORA <-function(){
...
outputApp=runApp(list(
  ui = fluidPage(
...
),
 server = function(input, output, session){
...
  }  
))
...
return(outputApp=NamedORAResults)}

I have in this context also a second question:

How do I declare functions, which are only locally defined, e.g. in

dbtORA <-function(){
...
matlabmin=function(...){...}
...}

gives the warning:

  • dbtORA: no visible global function definition for 'matlabmin'
1
rfunctionpackagesshiny
There's a couple of fixes depending on whether or not there's a way to bind the variable in the package you're using. The universal fix is to put dbtORA <- NULL at the top of your script before the variable is called. The problem is you likely that have some sort of function that is probably reading a variable from a data.frame or list and using non standard evaluation – Tyler Rinker
dbtORA is a functon not variable, which uses alot other functions and is able to start a shiny interface. I dont understand your suggestion – mthrun
Did you declare the package functiontions you're using in the NAMESPACE imprts? The solution depends on whether you manage this manually or with something like devtools. – Tyler Rinker
Could you please elaborate this? I use Rstudio with Rtools, all checks are done automatically. – mthrun
Do you use roxygen2? If not I highly recommend it (+ devtools ; which is built into alot of RStudio). Here's more on NAMESPACES: cran.r-project.org/doc/manuals/r-release/… but roxygen would make this management easier. – Tyler Rinker

1 Answers

2
votes

For all of you, who have the same problem:

  1. In the DESCRIPTION file you have to write

    Imports: shiny

    and not

    Depends: shiny

  2. In the NAMESPACE file you have to write

    import(shiny)

No clue, why it has to be done like this only with shiny...