MATLAB: Matlab Cluster function

clusterclusteringcorrelation

I have an annual daily data set of 365 points which should be in different groups over the four seasons of the year. From the scatter graph I can distinguish these four groups but ofcourse this is not enough to be able to prove it. I would like to use the cluster function and output a scatter graph that illustrates these four groups. However from the Matlab help I cant see which of the many functions available for clustering is the one I need.

Thanks

Best Answer

Thanks for the advice, this seems to be exactly what I am looking for!

Can I edit this coding to produce a scatter diagram of the number of clusters I have in my data and not a silhoutte diagram?

Thanks again

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MATLAB: How i can solve this problem? Pleas!

Your ‘T’ matrix must become a cell array. See my sample of ‘T’ for an example.

Once you do that, I would do something like this:

Y = [12.004
    13.1573 
    11.1665  
    11.8082    
    12.2129   
    12.8075   
    12.4167  
    11.5708   
    12.5798    
    13.7489];
T={'cluster2'; 'cluster1'; 'cluster3'; 'cluster9'; 'cluster0'; 'cluster7'; 'cluster4'}; % Sample Of Cell Array
[UnqClust,~,idx] = unique(T);                                                           % Unique Values & Locations
Out = Y(idx);                                                                           % Mapped Output
for k1 = 1:length(idx)
    fprintf(1, '\t%s\t%.4f\n', T{k1}, Out(k1))              % Demonstration Output (Delete Loop)
end
  cluster2  11.1665
  cluster1  13.1573
  cluster3  11.8082
  cluster9  12.4167
  cluster0  12.0040
  cluster7  12.8075
  cluster4  12.2129

MATLAB: Sort items to existing cluster groups

Use the function cluster to give a cluster idx to each sample in X:

 C = cluster(Z,'MaxClust',number_of_groups);

Then find the closest sample for each new observation in W,

C(knnsearch(X,W,'k',1))

You may want also to look at knnclassify for more elaborated voting schemes. See also clusterdata that wraps pdist, linkage and cluster in one function call.

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MATLAB: How i can solve this problem? Pleas!

MATLAB: Sort items to existing cluster groups

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