[R] Strange message after reading multiple scripts from one folder

[Frank S.]

Dear Keith, Jim, John and Don:
 
Thanks a bunch for your quick replies! They have helped me a lot in order to understand the problem I had in the code. As all of you pointed out, the root of problem consisted in having a list with two named elements. Furthermore, it is very interesting the use of invisible() statement. In particular, the solutions proposed by John Fox and Don MacQueen work correctly.
 
Thank you very much!!
 
Sincerely,
 
Frank S.
 
> From: macqueen1 en llnl.gov
> To: f_j_rod en hotmail.com; r-help en r-project.org
> Subject: Re: [R] Strange message after reading multiple scripts from one folder
> Date: Fri, 29 Jul 2016 15:54:20 +0000
> 
> For what it's worth (perhaps little...), I would normally do
> 
> for (pn in pathnames) source(pn)
> 
> It's clearer to read and won't return a strange value. I doubt there will
> be a noticeable difference in speed. It can easily be extended to be more
> informative, as in
> for (pn in pathnames) {
>   cat('--- now sourcing',pn,'---\n')
>   source(pn)
> }
> 
> One could also introduce error trapping using try() in this version.
> 
> As far as surpassing the message is concerned, one option would be to put
> your sapply() expression inside invisible(). Not sure what will happen in
> that case if any of the scripts fail with an error.
> 
> > 10*2
> [1] 20
> > invisible(10*2)
> 
> >
> 
> -Don
> 
> -- 
> Don MacQueen
> 
> Lawrence Livermore National Laboratory
> 7000 East Ave., L-627
> Livermore, CA 94550
> 925-423-1062
> 
> 
> 
> 
> 
> On 7/29/16, 3:52 AM, "R-help on behalf of Frank S."
> <r-help-bounces en r-project.org on behalf of f_j_rod en hotmail.com> wrote:
> 
> >Dear list,
> > 
> >I have one folder named "scripts_JMbayes", wich contains 10 R scripts.
> >I can read them properly by doing:
> > 
> >> pathnames <- list.files(pattern="[.]R", path="Mydir/scripts_JMbayes",
> >>full.names = TRUE)
> >> sapply(pathnames, USE.NAMES = FALSE, FUN = source,)
> > 
> >However, R generates the following message:
> > 
> >        [,1]  [,2]  [,3]  [,4]  [,5]  [,6]  [,7]  [,8]  [,9]  [,10]
> >value   ?     ?     ?     ?     ?     ?     ?     ?     ?     ?
> >visible FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> > 
> >What does it mean and what should I change to avoid this message?
> >Any help would be appreciated!
> > 
> >Best,
> > 
> >Frank
> >
> > 		 	   		  
> >	[[alternative HTML version deleted]]
> >
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> 
 		 	   		  
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