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4 results for “from:Derek Jones”

RGB -> CYMK, with consistent colors
Derek Jones · Dec 1, 2020 · r-help

Martin, > However after some testing. > I totally agree that CMYK handling in R using pdf(..., colormodel = "cmyk") > is not correct. Looking at the source code of the function PostScriptSetCol in file src/librarygrDevices/src/devPS.c the conversion to CMYK...

RGB -> CYMK, with consistent colors
Derek Jones · Nov 30, 2020 · r-help

Martin, > However after some testing. > I totally agree that CMYK handling in R using pdf(..., colormodel = "cmyk") > is not correct. I thought the issue may be OS specific, but I get similar behavior on a Mac. I have discovered the...

RGB -> CYMK, with consistent colors
Derek Jones · Nov 29, 2020 · r-help

Martin, >> Have you tried printed a few pages in CMYK? >> >> A monitor is based on mixing light using Red-Green-Blue. So it is not >> possible for the monitor to show >> CMYK which must be printed on paper to view...

RGB -> CYMK, with consistent colors
Derek Jones · Nov 28, 2020 · r-help

All, I used the very useful colorspace package for the plots in my book (pdf available here): http://knosof.co.uk/ESEUR/ The color makes the plots look great, on screen. To get lots printed, the printer requires converting the...

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