[Rd] Adding text comments to graphics device output files?

Henrik Bengtsson hb at biostat.ucsf.edu
Wed Jul 31 06:12:38 CEST 2013

Hi Duncan,

this is perfect timing.  Your
https://github.com/duncantl/png/blob/master/testMeta.R example
illustrates what I'm looking for.

Yes, it would be great if this would be incorporated into the 'png' package.



On Tue, Jul 30, 2013 at 8:04 PM, Duncan Temple Lang
<dtemplelang at ucdavis.edu> wrote:
> Hi Henrik
>  I have some extensions of Simon U's png package
> to read and write metadata elements for PNG.
> They are at
>    https://github.com/duncantl/png.git
> When I have time to completely test them, maybe Simon
> may incorporate them.
>   D.
> On 7/30/13 7:59 PM, Henrik Bengtsson wrote:
>> Hi,
>> several image file format supports textual/meta data comments in one
>> way or the other.  For me an obvious usage would be to add
>> sessionInfo() information to PNG and PDF image files, ideally from
>> within R although external tools would work as well(*).  Has anyone
>> looked into this or have any suggestions or comments?
>> /Henrik
>> (*) One could even imagine including self-contained R
>> scripts/vignettes within such comments.
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