Rcmdr -> doItAndPrint -> summary method of S4-class objectnot in Rcmdr window but R Console

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch 
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Prof 
Brian Ripley
Sent: Monday, November 22, 2004 5:57 AM
To: Pfaff, Bernhard
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Rcmdr -> doItAndPrint -> summary method of 
S4-class objectnot in Rcmdr window but R Console

The FAQ Q8.1 does recommend that summary() methods do not 
print themselves but returned a classed object to be printed.

What doItAndPrint does is to capture the result of an 
explicit print, so it will only work for summary methods that 
follow that recommendation.

I do think doItAndPrint should be capturing all the output 
from a function via sink(), and not just the print of the 
final result.

On Mon, 22 Nov 2004, Pfaff, Bernhard wrote:

Dear list member,

John Fox proposed to me posting this problem to R-Help:

I have written a function suited for Rcmdr and included this in a 
R-file located in Rcmdr/etc as well as an augmented 

`Rcmdr-menus.txt'.

Now, I am faced with the following problem:
method show() of a S4-class object works flawlessly, that 

is `doItAndPrint'

works flawlessly and its output is returned correctly into 

the Rcmdr-Window.

However, by using method summary() for the same S4-class 

object fails, 

in the sense that the output is *not* printed in the Rcmdr 

window, but 

into the R Console. The summary()-method contains cat() and 

slots of 

the S4-class objects only.

My question is: How can it be achieved that method summary() of S4 
objects is printed in the RCmdr window and why, in the 

first instance, 

does it fail to do so by using `doItAndPrint'.

Any help or pointer is much appreciated,

Best Regards
Bernhard

platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
status
major    2
minor    0.1
year     2004
month    11
day      15
language R

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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595