R help - Mar 2008 - Sweave and printing error

Hi the list.

I am writing a tutorial for my student using LaTeX and sweave. I include 
some example that work (obiously) but I would also like to include some 
example that do NOT work (for pedagogie)...
Is it possible ?

At this point, I find that :
 - if there is a error in the code, Sweave stop
 - if I put the error in try(), Sweave compile but does not print the 
error as output.

Any solution ?

Thanks a lot

Christophe

Le mar. 25 mars ? 17:12, Christophe Genolini a ?crit :
> Hi the list.
>
> I am writing a tutorial for my student using LaTeX and sweave. I  
> include
> some example that work (obiously) but I would also like to include  
> some
> example that do NOT work (for pedagogie)...
> Is it possible ?
>
> At this point, I find that :
> - if there is a error in the code, Sweave stop
> - if I put the error in try(), Sweave compile but does not print the
> error as output.
>
> Any solution ?
>
> Thanks a lot
>
> Christophe
Something along these lines should do what you want:

<<echo=TRUE, eval=FALSE>>TRUE <- 3
@
<<echo=FALSE, eval=TRUE>>cat(try(TRUE <- 3))
@

If I recall correctly, this was discussed here before.

HTH

---
   Vincent Goulet, Associate Professor
   ?cole d'actuariat
   Universit? Laval, Qu?bec
   Vincent.Goulet at act.ulaval.ca   http://vgoulet.act.ulaval.ca