clear screen?

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