R help - Jul 2007 - text() and vector arguments like adj

Hello,

I remarked that the function
## Default S3 method:
text (x, y = NULL, labels = seq(along = x), adj = NULL,pos = NULL, offset = 0.5,
vfont = NULL,cex = 1, col = NULL, font = NULL, ...)

accepts vectors of arguments (of the same length) except for the parameter adj.
When passing a vector of information for adjusting the labels, only the first
value
is taken.  

Any special reason for this ?

btw: could a rotating argument like the 'srt' argument in mtext() be
incorporated ?

best
Bjoern

On Sat, 28 Jul 2007, strinz at freenet.de wrote:
> Hello,
>
> I remarked that the function
> ## Default S3 method:
> text (x, y = NULL, labels = seq(along = x), adj = NULL,pos = NULL, offset =
0.5, vfont = NULL,cex = 1, col = NULL, font = NULL, ...)
>
> accepts vectors of arguments (of the same length) except for the 
> parameter adj.
Not true, e.g. for vfont.
> When passing a vector of information for adjusting the labels, only the 
> first value is taken.
You mean supplying a vector value of length > 1 for 'adj', I guess.
> Any special reason for this ?
Yes, please DO read the help page:

      adj: one or two values in [0,1] which specify the x (and
           optionally y) adjustment of the labels.  On most devices
           values outside that interval will also work.

Note, 'one or two'.
> btw: could a rotating argument like the 'srt' argument in mtext()
be
> incorporated ?
Yes, *parameter* 'srt' works exactly as in mtext: see the '...'
part of
the help page.

-- 
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