Error when evaluating clusters of a dataset

Question

Alberto 2015-4-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/213931-error-when-evaluating-clusters-of-a-dataset

回答： Rasmita Ardu 2024-4-29

I'm trying to evaluate the number of a dataset, data is described bellow and clust are the results of a clustering algorithm (vector of classes):

eva=evalclusters(data,clust,'CalinskiHarabasz');

Depending on the data input I'm receiving almost all time the error:

Error using clustering.evaluation.ClusterCriterion (line 447)
The number of clusters to be evaluated must be different for different clustering solutions.

How can I solve the error? Columns are properties and rows are observations in the data array. Error seems to be in the clust array:

2  3  3  4  5  6  7  9  8
2  3  4  5  6  7  8  7  10
1  2  2  2  3  3  4  3  5
1  2  2  2  3  3  4  3  5
1  2  2  3  4  4  5  5  6
1  2  2  2  3  3  4  4  4
1  1  1  1  2  2  2  1  1
1  2  2  2  3  3  4  3  5
2  3  3  4  5  6  7  9  8
1  2  2  2  3  3  4  4  4
2  3  4  5  6  7  8  7  10
1  2  2  3  4  4  5  5  6
2  3  3  4  5  5  6  9  7
2  3  4  5  6  7  8  8  9
1  1  1  1  2  2  2  2  1
1  2  2  3  4  4  5  5  6
2  3  3  4  5  5  6  9  7
1  1  1  1  1  1  1  2  2
2  3  4  5  6  7  8  8  9
1  2  2  3  4  4  5  5  6
1  1  1  1  1  1  1  2  2
2  3  4  5  6  7  8  8  9
1  2  2  3  4  4  5  5  6
1  1  1  1  1  1  3  2  3
2  3  3  4  5  5  6  9  7

Thank you.

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Answer 1

Tom Lane 2015-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/213931-error-when-evaluating-clusters-of-a-dataset#answer_177046

It looks like your next-to-last column, which has cluster numbers up to 9, is missing cluster 6 so it only has 8 clusters. I believe the evalclusters function wants to help choose the number of clusters, and it's not prepared to deal with two different clustering solutions both with 8 clusters.

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Alberto 2015-4-29

It worked!, Thank you

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Answer 2

Rasmita Ardu 2024-4-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/213931-error-when-evaluating-clusters-of-a-dataset#answer_1449286

Hey!

I am facing the same error. Here, the number of clusters are 5 and I see that all clusters have some data points assigned as seen in the histogram plot. Can you help me understand how to resolve this ?