Groups > comp.graphics.apps.gnuplot > #3466

Re: Overlapping/Merge two density plot red and green scale using gnuplot

Path	csiph.com!xmission!news.alt.net
From	dale <dale@dalekelly.org>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Overlapping/Merge two density plot red and green scale using gnuplot
Date	Fri, 18 Nov 2016 00:42:03 -0500
Lines	27
Message-ID	<9sipsf.j97.19.1@news.alt.net> (permalink)
References	<093d02c9-93e0-4d98-b0ab-3144692fdd0a@googlegroups.com> <9siep8.i2q.19.1@news.alt.net>
Mime-Version	1.0
Content-Type	text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding	7bit
User-Agent	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.0a2
In-Reply-To	<9siep8.i2q.19.1@news.alt.net>
Content-Language	en-US
Xref	csiph.com comp.graphics.apps.gnuplot:3466

Show key headers only | View raw

On 11/17/2016 9:32 PM, dale wrote:
> 
> I could hack at a set operation later on ...

okay, a matrix operation will do first

[R,G,B]=[R]+[G]+[B]

for your example you have [R]=255 [G]=255 [B]=0

[R,G,B]=[255]+[255]+[0]=[255,255,0]

to get [C,M,Y] invert the [R,G,B] matrix
or invert [R],[G].[B] then add the three matrices to get the inverse of 
[R,G,B] which is [C,M,Y]

some other matrix inversion algorithms can be found on

https://www.mathworks.com/help/matlab/math/inverses-and-determinants.html

or

https://www.gnu.org/software/octave/doc/interpreter/Basic-Matrix-Functions.html


-- 
dale | http://www.dalekelly.org

Back to comp.graphics.apps.gnuplot | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Overlapping/Merge two density plot red and green scale using gnuplot Graziani Candiotto <graz13@gmail.com> - 2016-11-14 11:59 -0800
  Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-15 21:13 -0500
    Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-15 21:45 -0500
      Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-16 00:51 -0500
        Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-16 07:41 -0500
  Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-17 21:32 -0500
    Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-18 00:42 -0500
      Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-18 00:46 -0500
      Re: Overlapping/Merge two density plot red and green scale using gnuplot dale <dale@dalekelly.org> - 2016-11-18 21:57 -0500

csiph-web