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Concentric circles with different colors

5 vues (au cours des 30 derniers jours)
Siddhartha
Siddhartha le 13 Fév 2018
I'm trying to make concentric circles that have different edge colors like this:
I have made the concentric circles but I only can do it with one unified edge colors for all the circles. How do I specify each one with a different color?
Here is my code so far:
for
i=30:-5:5
rectangle('Position',[-i,-i,2*i,2*i],'Curvature',[1 1],...
'EdgeColor','y', 'LineWidth',4)
end
Thanks!

Réponses (3)

Gayatri Menon
Gayatri Menon le 16 Fév 2018
Hi,
Instead of using color option for specifying the color, you could use RGB triplets to specify them.You could use rand command to generate random values for RGB triplets in each iteration
rectangle('Position',[-i,-i,2*i,2*i],'Curvature',[1 1],'EdgeColor',rand(1,3), 'LineWidth',4)
Hope the above helps
Thanks

Jos (10584)
Jos (10584) le 16 Fév 2018
You can specify a colormap beforehand:
R = 30:-5:5 ; % radii
N = numel(R) ; %
Cmap = parula(N) ; % one of the many available maps, see the help
% now loop over the radii and colormaps using indexing
for k = 1:N
pos = R(k) * [-1 -1 2 2] ; % position
clr = Cmap(k,:) ; % RGB triplet
rectangle('Position', pos, 'Curvature', [1 1], ...
'EdgeColor',clr, 'LineWidth', 4)
end

Pratibha Gangwar
Pratibha Gangwar le 24 Jan 2022
5 concentric circle

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