[R] Mean of hexadecimal numbers

[William Dunlap]

Since these are color strings, you can use functions in the grDevices
package (other others) to manipulate them.  E.g., you can convert them
to various color spaces and perhaps use the mean in one of those
spaces as your 'average color'.

  > myColors <- c(One="#FF7C00",Two="#00BF40",Three="#FFFF00")
  > col2rgb(myColors)
        One Two Three
  red   255   0   255
  green 124 191   255
  blue    0  64     0
  > rgb2hsv(col2rgb(myColors))
           One       Two     Three
  h 0.08104575 0.3891798 0.1666667
  s 1.00000000 1.0000000 1.0000000
  v 1.00000000 0.7490196 1.0000000



Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Sat, Apr 16, 2016 at 8:27 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:

> ... and if you need to convert back:  ?as.hexmode
>
>
> -- Bert
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Sat, Apr 16, 2016 at 8:20 AM, Bert Gunter <bgunter.4567 at gmail.com>
> wrote:
> > ?strtoi
> >
> > You'll have to remove the "#" first, e.g. via substring()
> >
> > -- Bert
> >
> >
> > Bert Gunter
> >
> > "The trouble with having an open mind is that people keep coming along
> > and sticking things into it."
> > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> >
> >
> > On Sat, Apr 16, 2016 at 5:47 AM, Atte Tenkanen <attenka at utu.fi> wrote:
> >> Hi,
> >>
> >> How would you calculate the "mean colour" of several colours, for
> example
> >> c("#FF7C00","#00BF40","#FFFF00")?
> >>
> >> Yours,
> >>
> >> Atte Tenkanen
> >>
> >> ______________________________________________
> >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> 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 at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>

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