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Any way to output multi-color strings in gnuplot?

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For example the string "R G B" as title, with each letter colored in its color?

I am working on some visualization for radiation data from Safecast fixed sensors and was wondering if it will be better to color the title the way axes are colored (dark-green CPM and blue μSv/h)?

Output:	http://gamma.tar.bz/nGeigies/
Code:	https://github.com/thinrope/fixed_sensor_visualization

I figured out how to use enhanced text to change font and size mid-string, is there anything like that for color?
Or a way to pre-render several colored stings, then output them stuck together (say as centered title).

Any other comments on having the graphs more easy to understand/better looking are welcome.

Cheers,
Kalin.

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Any way to output multi-color strings in gnuplot? Kalin Kozhuharov <me.kalin@gmail.com> - 2014-06-14 08:41 -0700
  Re: Any way to output multi-color strings in gnuplot? Kalin Kozhuharov <me.kalin@gmail.com> - 2014-06-15 07:56 -0700
    Re: Any way to output multi-color strings in gnuplot? Karl <mail.kfr@gmx.net> - 2014-06-15 17:37 +0200

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