R help - Jul 2002 - Output and history

> From: Peter Dalgaard BSA [mailto:p.dalgaard at biostat.ku.dk]
> 
> Daniel Mastropietro <mastropi at uwalumni.com> writes:
> 
> > Hello,
> > 
> > I have the following two questions, rergarding:
> > 
> > (Output)
> > 1) Is it possible to have the output of a command automatically
> > displayed, without explicitly requesting it after the command, and
> > without using the print() function? For example, I want to see the
> > value of 'a'  when I write for instance 'a <-
rep(1,10)'.
> > I tried setting the 'echo' option to TRUE but it has no 
> effect on that.
> 
> No. "<-" creates an invisible object as its return value and
they
> don't print until you "visiblify" them. One standard device
is to put
> the whole thing in parentheses: (a <- rep(1,10)).
But couldn't he use the taskCallbackManager() to print .Last.value after
every evaluation at the top level?  I'd guess that sort of does what Daniel
wants.

Cheers,
Andy


------------------------------------------------------------------------------
Notice: This e-mail message, together with any attachments, contains information
of Merck & Co., Inc. (Whitehouse Station, New Jersey, USA) that may be
confidential, proprietary copyrighted and/or legally privileged, and is intended
solely for the use of the individual or entity named on this message. If you are
not the intended recipient, and have received this message in error, please
immediately return this by e-mail and then delete it.

=============================================================================
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at
stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

"Liaw, Andy" <andy_liaw at merck.com> writes:
> > No. "<-" creates an invisible object as its return value
and they
> > don't print until you "visiblify" them. One standard
device is to put
> > the whole thing in parentheses: (a <- rep(1,10)).
> 
> But couldn't he use the taskCallbackManager() to print .Last.value
after
> every evaluation at the top level?  I'd guess that sort of does what
Daniel
> wants.
Might be, but wouldn't that result in visible things getting printed twice?

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at
stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._