Re: [R] vignettes: .png graphics or pre-compiled .pdf

[Achim Zeileis]

On Fri, 13 Nov 2009, Michael Friendly wrote:

In a package I'm working on there is a vignette with a number of graphs that 
result in huge .pdf files, so
the .pdf for the vignette is around 17 Mb.  If these graphs are converted to 
.png, and the .tex file
is compiled with pdflatex, the resulting .pdf is ~1 Mb.
I'm reluctant to put the .Rnw file into the package as is, generating the 
huge .pdf for the vignette.
I first tried installing the smaller .pdf file in the package by itself (no 
.Rnw)
together with a file inst/doc/index.html as recommended
in 'Writing R Extensions.'  However, when the package is installed, 
vignette() can't find it

vignette(package="Guerry")
no vignettes found
vignette("MultiSpat")
Warning message:
vignette 'MultiSpat' *not* found

Alternatively, is there a way to generate .png graphs from the .Rnw file so 
that those are used in building
the .pdf for the package?  AFAICS, \SweaveOpts{} offers only the choices of 
eps/pdf = {TRUE/FALSE}.

Yes, but you can call the png() device yourself within the code chunk

<<>>=
png(file = "fig1.png", ...)
...
dev.off()
@

and then put

\includegraphics{fig1}

manually into the LaTeX. It's certainly not as nice as Sweave's automatic 
handling of figures but will work and still keep the file self-contained.
Z

-Michael

--
Michael Friendly     Email: friendly AT yorku DOT ca Professor, Psychology 
Dept.
York University      Voice: 416 736-5115 x66249 Fax: 416 736-5814
4700 Keele Street    http://www.math.yorku.ca/SCS/friendly.html
Toronto, ONT  M3J 1P3 CANADA

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