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varycolor

version 1.0 (1.83 KB) by

Provides maximum color variation for lines on plots.

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Editor's Note: This file was selected as MATLAB Central Pick of the Week

I was unhappy with the current implementation of the color schemes. This provides a way for a program to dynamicly scale the number of different colors on plots, and it ensures there won't be any color overlap.

Comments and Ratings (24)

Jeremy Maurer

Very helpful plotting function!

Yuan Gao

Sam Horne

I have used this function A LOT! Very useful.

Luke

Luke (view profile)

Goncalo, I am not sure if I fully understand what you are trying to do. This might be what you want.

dot_array = rand(10,44);
ColorSet = varycolor(10);
% each row gets its own color

figure(1)
for i = 1:10
x = 1:44; % need x values for plot
y = dot_array(i,:); %nab the ith row
h = plot(x,y);
set(h,...
'linestyle','.',...
'color',ColorSet(i,:));
hold all;
end
legend show Location NorthEastOutside

does this applies to dot plots instead of lines?

Example:

dot_array = rand(10,44);
ColorSet = varycolor(44);

for i = 1:10

figure(1)
legend show Location NorthEastOutside
set(gca, 'ColorOrder', ColorSet);
hold all;

for ii = 1:44
plot(i,dot_array(i,ii); hold on
end
end

It's not working... Can anyone help me with this?

abc

abc (view profile)

It served my purpose completely. There is now a more sophisticated function inspired by this file, "Generate maximally perceptually-distinct colors".

I found "Generate maximally perceptually-distinct colors" to be better in the case of a few lines.

jeong woo

Thanks!

Paula

Paula (view profile)

Very useful! Thanks a lot!

Benjamin I

Benjamin I (view profile)

Useful!

Albert

Albert (view profile)

Very helpful!

Shiguo

Shiguo (view profile)

Nick Sinclair

Good and functional. Should be shipped as default configuration in the Matlab package.

Kamil Wojcicki

Kamil Wojcicki (view profile)

Khalil

Khalil (view profile)

Daniel Helmick

Ryan, it sounds like you are going to be disappointed in this 'maximum' color separation too.

Open the file up, and you will see that this one is not 'maximum' for small numbers of line colors. Depending on how you quantify color separation, even large numbers of line colors could be argued to be non-maximum in some metrics.

I suspect CMAPLINE provides results more in line with your desires.

Ryan Ollos

Your function is nice. I have been trying to do something similar, in order to create a maximum number of distinct line colors to use as the axes ColorOrder. I haven't been able to figure out an algorithm which produces maximum color variation, and at the same time convince myself that the algorithm really gives the 'maximum' color variation.

So, my question is, how did you come up with the RGB curves, and if/how do you know that it is really optimal in terms of maximizing color variation?

Nikola Toljic

Thanks.

Daniel Helmick

Yes, thank you. I saw those and wasn't happy. The pick of the week description does an excellent job of pointing out some of the utility with this file.

http://blogs.mathworks.com/pick/2008/08/15/colors-for-your-multi-line-plots/

Matt S

Carlos Adrian Vargas Aguilera

Daniel, have you seen MATLAB's COLORMAP, JET, GRAY, LINES, etc?, or the functions at the FEx that lets you create a different colormap like USERCOLORMAP?

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MATLAB 7.4 (R2007a)

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