Message-ID: <eb555e660601042101n5b90dd99i278fc67a8b0752f5@mail.gmail.com>
Date: 2006-01-05T05:01:13Z
From: Deepayan Sarkar
Subject: defining a print method
In-Reply-To: <971536df0601042047p24519c59nce098ab8e134b4e2@mail.gmail.com>
On 1/4/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> In the following session we define an xx class and a print method
> for it. If I invoke it with print then it prints as expected but if
> we just type xx at the R prompt then we get nothing back. How
> do we define the print method so that it works in the latter
> case too?
>
> > xx <- structure("abc", class = "xx")
> > print.xx <- function(x, ...) shQuote(x)
shQuote doesn't print anything, you probably want
print.xx <- function(x, ...) print(shQuote(x))
-Deepayan
> > print(xx) # ok
> [1] "\"abc\""
> > xx # no output ????
> >
> > sessionInfo()
> R version 2.2.1, 2005-12-20, i386-pc-mingw32
>
> attached base packages:
> [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets"
> [7] "base"