Re: [Gnuplot-info] color blindness and gnuplot default colors

[Ethan A M. <merritt@u.washington.edu>]

On Saturday 16 February 2008 12:37, Micha Wiedenmann wrote:
> Hi,
> 
> Are there any arguments against changing gnuplots default colors to help 
>   people with color blindness? I think red and green following 
> immediatly each other is rather poor.

In the current version of gnuplot you can choose any colors you like,
in any order you like.

> >>  I think it would be helpful for people with color blindness to change
> >>  that order into
> >>
> >>  1 red
> >>  2 blue
> >>  3 magenta
> >>  4 cyan
> >>  5 green

So put this in your ~/.gnuplot initialization file:

 set style line 1 lc rgb "red"
 set style line 2 lc rgb "blue"
 set style line 3 lc rgb "magenta"
 set style line 4 lc rgb "cyan"
 set style line 5 lc rgb "forest-green"
 set style increment user

As I see, Hernan has already suggested this.

 
> Here is my email from gnuplot-info:
> 
> Hernán Gonzalo Asorey wrote:
> > On Thu, Feb 14, 2008 at 8:57 AM, Micha Wiedenmann <mw...@gm...> wrote:
> >> Hi there,
> >>
> >>  gnuplot default colors seem to be
> >>
> >>  1 red
> >>  2 green
> >>  3 blue
> >>  4 magenta
> >>  5 cyan
> >>  ...
> >>
> >>  I think it would be helpful for people with color blindness to change
> >>  that order into
> >>
> >>  1 red
> >>  2 blue
> >>  3 magenta
> >>  4 cyan
> >>  5 green
> >>
> >>  This makes the clas of red and green less likely.
> >>
> >>  A workaround is using linetype in the plot command as in
> >>
> >>  plot [][-1:1] sin(x), cos(x) lt 3, tan(x) lt 4, x lt 5, x**2 lt 2, x**3
> >>
> >>  or defining line styles
> >>
> >>  set style line 2 lc 3
> >>  set style line 3 lc 4
> >>  set style line 4 lc 5
> >>  set style line 5 lc 2
> >>  set style increment user
> >>  plot [][-1:1] sin(x), cos(x), tan(x), x, x**2, x**3
> >>
> >>  But this is lots of work on a day by day basis and I see no argument
> >>  against change gnuplots default, at least moving green down in the color
> >>  list.
>  >
>  > This is a good idea. As far as I know you can "pseudo-implement" that
>  > by seting the .gnuplot file (or GNUPLOT.INI) in your home directory:
>  >
>  > "[...] If the initialization file is found, `gnuplot` executes the
>  > commands in it.
>  >  These may be any legal `gnuplot` commands, but typically they are 
> limited to
>  >  setting the terminal and defining frequently-used functions or 
> variables."
>  >
>  > (see help .gnuplot for further details).
>  > Cheers,
>  >
>  > Hernán
> 
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-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742