[R] globally set digits=3 in Sweave

[Liviu Andronic]

On 8/20/09, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
>  Why not put
>
>  <<echo=FALSE>>=
>  options(digits=4)
>  @
>
>  somewhere near the top of your document?
>
I did so, but it has no practical effect on \Sexpr{} (which I'm
interested in, and failed to mention in the original e-mail).

With
<<echo=FALSE>>=
options(digits=4)
@

, the following
<<>>=
tmp <- pi
tmp
@

will yield
> tmp <- pi
> tmp
[1] 3.142


, while
\Sexpr{tmp}

will yield
3.14159265358979


and
\Sexpr{format(tmp)}

will yield
3.142


Liviu