[Bioc-devel] check shiny app: issue with global variables: input$Vars is not found

[Karim Mezhoud]

Hi Stefan,
Thanks,
Yes you are right.
I mean r_data$globalVar2 instead input$globalVar2.
which r_data is a new env used to store global variables.
The question is:
Some functions run with  variables returned from ui.R  (input$var1) and in
some case theses variables are saved as global variable to avoid
re-computing.

when I check R CMD, the input$var1 is not found.

How to avoid this issue?

Thanks,
Karim



On Tue, May 3, 2016 at 3:46 PM, Stefan Haunsberger <
stefan.haunsberger at gmail.com> wrote:

> Hi Karim,
>
> I assume this is because the input parameter only assess the ones that are
> passed on from the ui-environment.
> The global variables are available without the 'input' prefix anyways.
>
> For example, if you declared *globalVar2* as a global variable (let's say
> in a global.r) then you don't need the input$ prefix.
> Variables declared within the ui-function body need to be addressed by
> input$.
>
> I hope that helps.
>
> Cheers,
>
> Stefan
>
> On Tue, May 3, 2016 at 1:57 PM Karim Mezhoud <kmezhoud at gmail.com> wrote:
>
>> Dear R,
>> usually, Shiny app uses global variables saved in a session.
>> These variables can be returned by client web page (checkbox or select).
>>
>> for example:
>>  FUN1 <- function(input$var1){
>>  a <-  input$car1 + input$globalVar2
>> return (a)
>> }
>> when I run check package I got error like
>> object input$globalVar2 not found.
>>
>> Also the error is possible in running examples. The global variable or
>> input$var are not found in shiny app.
>>
>> How we can avoid these issues.
>> Thanks,
>> Karim
>>
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>>
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>

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