Hi Michael,

Thanks a lot  - enclosing the qplot in a print() worked perfectly !

Regards,
-fj


On Thu, Aug 2, 2012 at 7:37 PM, R. Michael Weylandt <
michael.weylandt@gmail.com> wrote:

> On Thu, Aug 2, 2012 at 6:30 PM, Dennis Murphy <djmuser@gmail.com> wrote:
> > On Thu, Aug 2, 2012 at 1:38 PM, Michael Weylandt
> > <michael.weylandt@gmail.com> wrote:
> >> You need to explicitly print() the graphs to make them show -- or in
> recent ggplot2 versions I think you can also use plot() as an alias.
> >
> > @ Michael:
> > You don't need the print() wrapper for grid-based graphics in knitr,
> > although you do need it in Sweave. See the bottom of p. 1 in the knitr
> > manual for an example:
> > http://cloud.github.com/downloads/yihui/knitr/knitr-manual.pdf
>
> But see my follow-up with firdaus and section 3.2 of the same manual.
>
> Cheers,
> Michael
>

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