How to change color of cluster points in matlab

Question

I am implementing AP clustering algorithm. I don\'t know how to assign different colors to different cluster points.

My code segment is:

    I=find(d         


        

Answer 1

Here is an example for how to plot one cluster in red dots and one in green plus signs:

n = 100;
cluster1 = randn([n,2]); % 100 2-D coordinates 
cluster2 = randn([n,2]); % 100 2-D coordinates 
hold on
plot(cluster1(:,1),cluster1(:,2),'r.'); %plotting cluster 1 pts
plot(cluster2(:,1),cluster2(:,2),'g+'); %plotting cluster 2 pts

Now just get your data into the same form as cluster1 and cluster 2 (matrices of the points in cluster 1 and cluster 2) and then you can plot them.

Let's say you don't have a fixed number of clusters. Then you can do this:

%Defines some order of colors/symbols
symbs = {'r.', 'g+','m*','b.','ko','y+'}; 

figure(1)
hold on
for i = 1:num_clusters,
   % Some code here to extract the coordinates in one particular cluster...
   plot(cluster(:,1),cluster(:,2),symbs{i});
end

Use this link on colorspec from petrichor's comment to learn about all the different combinations of symbols/colors you can define.