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

[Fox, John]

Dear Frank,

What you see isn't a "message" but the result returned by sapply(). The ?s indicate that sapply() didn't know what to do with the corresponding element. In an individual use of source(), the result, a 2-element list, is returned invisibly, so you don't see it. 

To see what's going on, try 

res <- lapply(pathnames, FUN = source)
str(res)

I hope this helps,
 John

-----------------------------
John Fox, Professor
McMaster University
Hamilton, Ontario
Canada L8S 4M4
Web: socserv.mcmaster.ca/jfox



> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Frank S.
> Sent: July 29, 2016 6:52 AM
> To: r-help at r-project.org
> Subject: [R] Strange message after reading multiple scripts from one folder
> 
> 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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