Groups > comp.graphics.apps.gnuplot > #639

set palette cubehelix

From	Ingo Thies <ingo.thies@gmx.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	set palette cubehelix
Date	2011-10-08 13:55 +0200
Message-ID	<9fas1rF6r5U1@mid.individual.net> (permalink)
References	<9brre9Fvf3U1@mid.individual.net> <j3clfl$684$1@dont-email.me> <9bulcrFl92U1@mid.individual.net> <73c4a8f3-cb45-4e03-b887-58466e760963@v18g2000yqj.googlegroups.com>

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Hi Ethan,

I have made a first test - looks good, well done!

I am only wondering why the gamma correction seems to have the opposite 
effect: gamma>1 makes dark regions appear brighter while the same 
happens for gamma<1 in mine/Davids code. So in gnuplot gamma=1.5 
corresponds to gamma=0.6666.... in the original cubehelix.

According to http://en.wikipedia.org/wiki/Gamma_correction I would say 
that mine interpretation is correct (see the example photograph of the 
lady in the water). But the Wikipedia article might be wrong as well.

Greetings,

Ingo

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Thread

Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-27 11:24 +0200
  Re: Plotting into table with multiple columns Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-08-27 13:41 +0200
    Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-27 17:04 +0200
  Re: Plotting into table with multiple columns sfeam <sfeam@users.sourceforge.net> - 2011-08-27 22:56 -0700
    Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-08-28 12:59 +0200
      Re: Plotting into table with multiple columns Christoph Bersch <usenet@bersch.net> - 2011-09-02 10:23 +0200
      Re: Plotting into table with multiple columns "EAMerritt@gmail.com" <eamerritt@gmail.com> - 2011-09-21 16:43 -0700
        Re: Plotting into table with multiple columns Ingo Thies <ingo.thies@gmx.de> - 2011-10-08 13:16 +0200
        set palette cubehelix Ingo Thies <ingo.thies@gmx.de> - 2011-10-08 13:55 +0200
          Re: set palette cubehelix sfeam <sfeam@users.sourceforge.net> - 2011-10-08 10:48 -0700
            Re: set palette cubehelix sfeam <sfeam@users.sourceforge.net> - 2011-10-08 14:30 -0700

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