[R] Chart colors

[Michael Sumner]

Those numbers that you pass to col = ... correspond to the current
sessions palette, not to the names of colors() that R knows about. You
can either set up your own palette:

## see current palette
 palette()
[1] "black"   "red"     "green3"  "blue"    "cyan"    "magenta" "yellow"
[8] "gray"

## set up new palette
palette(grey(seq(0, 0.9, length = 25)))
plot(1:25, col = 1:25, pch = 16)

or give a direct set of colours to col = as either character names or
hex values.

See "Color Specification" under ?par and ?palette for an overview and
pointers to other functions.

Cheers, MIke.

On Tue, Dec 10, 2013 at 9:08 AM, Katharine Miller - NOAA Federal
<katharine.miller at noaa.gov> wrote:
> Hello,
>
> I am having difficulty obtaining the correct colors in my R charts.
>
>> colors()[c(552, 254, 26)]
> [1] "red"   "green" "blue"
>
> But, if I specify col=552 in my barplot, I get gray bars.  Likewise,
> col=254 gives bright pink, and col=26 is a red-orange.   I get accurate
> results when I spell out the names, but I am making a pallet with 20- 30
> colors and it is a real pain to have to do that.  Can anyone help me figure
> out what I am doing wrong?
>
> Thanks
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.



-- 
Michael Sumner
Hobart, Australia
e-mail: mdsumner at gmail.com