Extracting data points from a matrix and saving them in different matrixes in MATLAB

Posted by Hossein on Stack Overflow See other posts from Stack Overflow or by Hossein
Published on 2010-05-30T13:20:49Z Indexed on 2010/05/30 13:42 UTC
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Hi, I have a 2D Matrix consisting of some coordinates as below(example): Data(X,Y):

45.987543423,5.35000964
52.987544223,5,98765234

Also I have an array consisting of some integers >=0 , for example: Cluster(M)

2,0,3,1

each of these numbers in this array corresponds with a row of my 2D Matrix above.For example, it says that row one(coordinate) in the Data Matirx belongs to the cluster 2,second row belongs to cluster 0 and so on. Now I want to have each of the datapoint of each cluster in a separate matrix, for example I want to save datapoints belonging to cluster 1 in a separate matrix, cluster 2 in a separate matrix and so on,.... I can do them manually, but the problem is this has to be an automatic extraction. which means that the number of clusters(range of the numbers in the cluster array varies in each run) so I have to have a general algorithm that does this extraction for me. Can someone help me please? thanks

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