[R] Computing plot size in Sweave

[Yihui Xie]

I guess that is not possible with Sweave, but it is possible in the
knitr package (an alternative to Sweave). You can set

opts_knit$set(eval.opts = c('fig.height', 'fig.width'))

so that these two options will be evaluated as R expressions (e.g.
fig.height=x means it takes value from a variable x).

Note width/height have been renamed to fig.width/fig.height in knitr.
See http://yihui.name/knitr/

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



On Mon, Feb 20, 2012 at 9:15 AM, BXC (Bendix Carstensen) <bxc at steno.dk> wrote:
> Sometimes you want to compute the physical size of a plot based on data.
> In R itself this is no problem.
>
> But is there a way to compute the values of height and width in S-weave, say:
>
> <<graph,fig=TRUE,height=xx,width=yy>>=
>
> where xx and yy are computed and not physically written in the document?
>
> Bendix
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