how to join the centroid to respective cluster points.

I have a data file carrying 30 points x,y coordinates in the manner

1 20 30

2 21 31

3 22 32... so on.

I am using following commands to cluster my data in n groups.

X=load('dabra_village_data.txt');

Y=pdist(X,'euclid');

Z=linkage(Y,'median');

T= cluster(Z,'cutoff',0.9)

x=X(:,2);

y=X(:,3);

indexstring =T(:,1);

gscatter(x,y,T)

Now T has the index of each point to which cluster it belongs to.

c1 matrix carries x y coordinates of centroids of each cluster.

plot(c1(:,1), c1(:,2),'*r')

I want to join these centroid points to their cluster points respectively in the same graph.