On 3/31/2009 12:29 PM, hadley wickham wrote:
col2rgb("#00000079", TRUE)[,1] red 0 green 0 blue 0 alpha 121col2rgb("#00000080", TRUE)[,1] red 255 green 255 blue 255 alpha 0col2rgb("#00000081", TRUE)[,1] red 0 green 0 blue 0 alpha 129Any ideas?
The #00000080 string converts into the hex integer 0x80000000, which, by an unfortunate coincidence, is the NA_integer value. Since NA_integer becomes the background colour, you get white instead of black with alpha=0x80.
This can probably be fixed (if you have a string, there's a different way to know you have an NA). Want to work out a patch? The file to look at is src/main/colors.c.
Duncan Murdoch ______________________________________________ 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.
