Page eject and clearing the console

On Jan 4, 2011, at 1:19 PM, John Sorkin wrote:

I have received help on one of my questions (thank you Henrique Jorge
and ), viz. how I can clear the console from an R program.
I have not yet received help on how I can skip to the top of the next
page, i.e. cat("\n") skips to the next line, is there an equivalent  
way
to skip to the top of the next page?
"\n" does NOT "skip to the next line". It is a character and it is  
interpreted by some sort of program, say a a plotting program or a  
word-processor as a line feed. You need to specify what sort of  
program you intend to do this "skipping-to-next-page" action and  
also provide the character sequence that that program uses to signal  
that action. (There are not any pages in R except perhaps multi-page  
plots but you seem to be in character mode at the moment.)

It has occurred to me that you may be asking for something that will  
give the illusion of "clearing the screen" but will in fact be just  
"printing" a page of blank space on a console display, scrolling would  
ahve been the name I would have given it. In which case:

scroll <- function(lines=40) cat(rep("\n", lines))
scroll()
-- 
David.

Thanks,
John

John David Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to  
faxing)>>>
Henrique Dallazuanna <wwwhsd at gmail.com> 1/4/2011 11:58 AM >>>
Take a look on:
http://tolstoy.newcastle.edu.au/R/e11/help/10/09/8463.html

On Tue, Jan 4, 2011 at 2:54 PM, John Sorkin
<jsorkin at grecc.umaryland.edu>wrote:

(1) I know that \n when used in cat, e.g. cat("\n") produces a line
feed
(i.e. skips to the next line). Is there any escape sequence that  
will
go to
the top of the next page?
(2) I know that control L will clear the console. Is there an
equivalent
function or other means that can be used in R code to clear the
console?
Thanks,
John

John David Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)

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Page eject and clearing the console

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