Hi,
Have you tried the recent rasterImage() function?
HTH,
baptiste
On Sep 8, 2010, at 7:30 PM, Stephen T. wrote:
>
> Hi list,
> I wonder if anyone has thoughts on making image plots in R [using image() or
> image.plot(), or filled.contour()]- I've made quite a bit now, but they seem
> quite large in size when exported to pdf file format (even after compressing
> with pdftk or ghostscript, which I regularly do). I know that for "images",
> raster graphics output (png, tiff) may be the way to go, but often the ones I
> make are multi-panel plots with other graphics on them, and are usually
> included in a LaTeX document (PDFLaTeX does accept png) and require
> stretching/shrinking (and/or possibly editing with Adobe Illustrator). I have
> had some luck exporting image plots from Matlab (to postscript or pdf) before
> in the sense that the files seem smaller and less pixelated. Is this a
> difference in the way image() plots are produced, or with the way the image
> is written to the pdf() device (if anyone is familiar with other
> image-exporting programs...)? The other day I had a 13MB dataset, and
> probably plotted 3/4 of !
it!
> using image() and the compressed pdf output was about 8 MB (it contained
> other stuff but was an addition of a few KB). I tried filled.contour(), as I
> understand that it colors polygons to fill contours instead of coloring
> rectangles at each pixel - and it has saved me before - but this time the
> contours may have been too sharp as as its compressed pdf came out to be 62
> MB... (ouch!). I have not tested this data set with other software programs
> so it may just have been a difficult data set.
> Is there a good solution to this (or is it simply not to use a
> vector-graphics format in these instances), and just for my curiosity, are
> you aware of any things that other software (data analysis) programs do uder
> the hood to make their exported images smaller/smoother?
> Thanks much!
> Stephen
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
