R help - Nov 2010 - a rounding option for \Sexpr{}?

Hi all,

Currently Sweave does not format the (especially numeric) value in
\Sexpr{}, and I often have to round() the numbers explicitly,
otherwise I will get more than 10 digits, which is not necessary for
me in most cases. Is there a way to specify the number of digits to be
kept for values in \Sexpr{}? e.g. can we make \Sexpr{} respect
getOption('digits')?

Thanks!

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA

Yihui Xie-2 wrote:
> 
> 
> Currently Sweave does not format the (especially numeric) value in
> \Sexpr{}, and I often have to round() the numbers explicitly,
> otherwise I will get more than 10 digits, which is not necessary for
> me in most cases. Is there a way to specify the number of digits to be
> kept for values in \Sexpr{}? e.g. can we make \Sexpr{} respect
> getOption('digits')?
> 
> 
Currently, Sweave does an eval on Sexpr, and that can be anything other than
a number (is mostly is, though). And you cannot define a new version of
Sexpr in latex, because Sexpr only looks like latex, but is processed before
texing.

My solution is to always do the rounding and formating in the R chunk (e.g.
with latexSN of Hmisc) to unclutter the Sexpr.

Dieter




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