Change plot color long/shortnames to new default colors.

Question

William Wooley 2015-12-28

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回答： Christian Claumarch 2018-7-17

Suppose I want to make a plot where a later series has the same color as an earlier series, which is plotted in one of the default colors.

Intuitively, one would do something like this:

n = 10;
a = rand(n,1);
b = rand(n,1);
w = 1e-1;
p = 1:n;
plot(p,a,p,b,p,a+w,'b',p,b+w,'r','LineWidth',3);

However, the 'b'lue and 'r'ed in the second two plots aren't the default blue and red. (I believe that they are the old defaults?). My question is: Can I set the long/shortnames (e.g. 'b', 'r') so that they are the new default colors?

Perhaps I should add that I know that I can achieve the same effect by providing the RGB triple for the default color needed. For forgetful people like me, though, that adds maybe two more steps each time I want to do this.

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Answer 1

Vineeth Kartha 2016-1-4

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Hi,

It is not possible to change the RGB values set for the long/shortnames. But as a workaround you can try saving the RGB values of the new default colors, and use these variables to specify the color.

the following command can be used to get the RGB value of the default colors

color=get(gca,'ColorOrder')

This will return a 7x3 matrix with the RGB value of the seven new default colors.

then use the values in each row to specify color to your graph.

x=rand(1,10);
y=rand91,10);
plot(x,y,'Color',color(1,:))

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William Wooley 2016-1-4

Right, thanks. That's the workaround I was trying to avoid but it is good to know that it can't be done.

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Answer 2

Christian Claumarch 2018-7-17

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Depending on what you are aiming to do with this functionality this might help: Restart color order.

data = [5 6 7; 2 3 4; 4 5 6];
plot(data);
hold on
ax = gca;
ax.ColorOrderIndex = 1;
plot(3*data);
hold off

In a case where you want to show the same data before and after treatment in the same color in the same plot this does the trick. If you want to fully control the color the previous answer is better.