[R] clear screen?

[Charles Annis, P.E.]

Thank you Gabor.  I'm sorry I forgot whom to acknowledge as the author.

My (limited) understanding is that rcom with rscproxy essentially give the R
session the ability to look like a server, and that this scares some who are
concerned with security issues.  I don't want any more capability than
necessary and thus wanted something less potent to clear the console.

Thanks for the insight.

Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  614-455-3265
http://www.StatisticalEngineering.com
 

-----Original Message-----
From: Gabor Grothendieck [mailto:ggrothendieck at gmail.com] 
Sent: Sunday, May 03, 2009 7:31 PM
To: Charles.Annis at statisticalengineering.com
Cc: r-help at r-project.org
Subject: Re: [R] clear screen?

You got it from my post here:
http://tolstoy.newcastle.edu.au/R/help/06/02/21556.html

Don't know why rcom's dependencies are a consideration
but RDCOMClient can also handle this:

cls <- function () {
	require(RDCOMClient)
	wsh <- COMCreate("Wscript.Shell")
	wsh$SendKeys("\f")
	invisible(wsh)
}
cls()



On Sun, May 3, 2009 at 6:50 PM, Charles Annis, P.E.
<Charles.Annis at statisticalengineering.com> wrote:
> I’ve been using this routine for several years.  I’m sorry, I don’t
remember
> where I got it.  It works as it should, viz. it blanks the R console.  But
> it requires package rcom and now that requires rscproxy.
>
> cls <-
> function ()
> {
>    require(rcom)
>    wsh <- comCreateObject("Wscript.Shell")
>    comInvoke(wsh, "SendKeys", "\f")
>    invisible(wsh)
> }
>
>> cls()
> Loading required package: rcom
> Loading required package: rscproxy
>
> This seems like overkill to me just to blank the R console, especially
since
> I am trying to diminish the number of necessary packages to support my
> home-brew package.
>
> So, is there an easier way to blank the R console in Windows?
>
>
>
>> sessionInfo()
> R version 2.8.1 (2008-12-22)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
> States.1252;LC_MONETARY=English_United
> States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
>
> attached base packages:
> [1] splines   tcltk     stats     graphics  grDevices utils     datasets
> methods   base
>
> other attached packages:
> [1] rcom_2.1-1         rscproxy_1.2-0     survival_2.35-3
> RColorBrewer_1.0-2   RODBC_1.2-5       myhomebrew
>
> loaded via a namespace (and not attached):
> [1] tools_2.8.1
>>
>
>
>
> Charles Annis, P.E.
>
> Charles.Annis at StatisticalEngineering.com
> phone: 561-352-9699
> eFax:  614-455-3265
> http://www.StatisticalEngineering.com
>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>