how to clear screen in R-console?

And here is a reworked version that checks if it is RGui, if WSH is 
started, etc. and that returns invisibly TRUE/FALSE:

# An R function to clear the screen on RGui:
cls <- function() {
	if (.Platform$GUI[1] != "Rgui")
		return(invisible(FALSE))
	if (!require(rcom, quietly = TRUE)) # Not shown any way!
		stop("Package rcom is required for 'cls()'")
	wsh <- comCreateObject("Wscript.Shell")
	if (is.null(wsh)) {
		return(invisible(FALSE))
	} else {
		comInvoke(wsh, "SendKeys", "\014")
		return(invisible(TRUE))
	}
}
#cls() # test
# If you want to make sure that it worked (well, not 100% sure, but...)
res <- cls()
if (res) cat("Console should be cleared now!\n")

Best,

Philippe Grosjean

P.S.: Gabor, I would like to include this function in the SciViews 
bundle. Would it be a problem for you?

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  ) ) ) ) )
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  ) ) ) ) )   Mons-Hainaut University, Pentagone (3D08)
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  ) ) ) ) )
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Here is a version that uses rcom instead of RDCOMClient.
This has the advantage that rcom is on CRAN.

cls <- function() {
	require(rcom)
	wsh <- comCreateObject("Wscript.Shell")
	comInvoke(wsh, "SendKeys", "\014")
	invisible(wsh)
}
cls() # test

On 2/17/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:

Here is a translation of Norm Olsen's vbscript code into pure R.
This is intended for use with the Windows Rgui interface.

cls <- function() {
      require(RDCOMClient)
      wsh <- COMCreate("Wscript.Shell")
      wsh$SendKeys("\014")
      invisible(wsh)
}
cls()  # invoke



On 2/17/06, Marcus Leinweber <leinweber at neuro.mpg.de> wrote:

have already tried this?

http://finzi.psych.upenn.edu/R/Rhelp02a/archive/55752.html

m.

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Michael
Sent: Thursday, February 16, 2006 9:23 PM
To: Henrik Bengtsson
Cc: R-help at stat.math.ethz.ch
Subject: Re: [R] how to clear screen in R-console?

I am actually using Rgui on Windows...

What can I do?

There is no way to programmatically clear screen?

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