how can i get same color graph in each iteration of for loop?

In my Matlab code, I am trying to merge two graphs in each iteration of for loop. I want the color of graph generated to be same for an iteration, but varying color with iteration

Answer 1

[Birdman]

One approach, notice how I used color property of plot:

x=1:10;
y=2*x;
for i=1:numel(x)
a=rand(1,3);
plot(x(i),y(i),'Marker','o','color',a);hold on;plot(x(i)+1,y(i),'Marker','o','color',a);hold on;
end

[shubham khodiyar]

I am not getting the same color in legend.

[Birdman]

Change this line

    plot(x(i),y(i),'Marker','o','color',a);hold on;plot(x(i)+1,y(i),'Marker','o','color',a);hold on;

to

plot(x(i),y(i),'Marker','o','color',a,'DisplayName',num2str(i));hold on;plot(x(i)+1,y(i),'Marker','o','color',a,'DisplayName',num2str(i));hold on;legend('show');

[Giovanni Bambini]

Is there a way to simply save information of colors form plot, or reset the "Matlab color ordering"?

Answer 2

[Christopher Coello]

Use the property Color when you plot the figure and the colormap of your choice (parula post 2014b, jet before)

g = randn(12,150);
h = randn(12,150)+5;
figure;c_map = parula(12);
for iR = 1:12
  hAx=subplot(4,3,iR);hold(hAx,'on');
  plot(g(iR,:),'Color',c_map(iR,:));
  plot(h(iR,:),'Color',c_map(iR,:));
end

Answer 3

[Sree Harsha Bhimineni]

You can use a random function as follows:

for i=1:1:10
v = rand(3,1);
plot(X1,Y1,'Color',v);
hold on
plot(X2,Y2,'Color',v);
end