shinydashboard not loading on the first call to it

[joeoli...@gmail.com]

I am using the shinydashboard package and I have a app.r file that looks like:

library(shiny)
library(shinydashboard)

shinyApp(ui, server)

I press CTRL + SHIFT + ENTER to run it and I get an error:

Error in eval(expr, envir, enclos) : 
  could not find function "dashboardPage"

But then I highlight

library(shinydashboard)

and re-run that line by pressing CTRL + ENTER

and the output is:

Attaching package: ‘shinydashboard’

The following object is masked from ‘package:graphics’:

    box

THEN I press CTRL + SHIFT + ENTER again and the app works fine.

Any idea why "library(shinydashboard)" doesn't seem to register the first time or any way I can attach it like it seems to want?

[Winston Chang]

That's really weird. Maybe you have some strange non-visible characters on that line or the surrounding ones? I've seen that happen before when code is cut and pasted. I'd try deleting the first three lines, and then typing them in manually.

If that doesn't fix it, you can send me the code directly and I'll see if I can find the problem.

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[Winston Chang]

Hi Joe, I've taken a look at your app. The problem is that you have a app.r file, in addition to server.r and ui.r.

You can either use a single file called app.r, or you can use server.r + ui.r.

For examples of using app.r, see:

  http://shiny.rstudio.com/articles/single-file.html

For examples of server.r + ui.r, see:

  http://shiny.rstudio.com/articles/basics.html

-Winston