| Hu Chunyan,Hu Liangping,Cluster analysis of disordered samples： based on the methods of Mahalanobis distance and the intermediate distance[J].SICHUAN MENTAL HEALTH,2024,37(S1):60-65 |
| Cluster analysis of disordered samples： based on the methods of Mahalanobis distance and the intermediate distance |
DOI：10.11886/scjsws20240110004 |
| English keywords:Disordered samples Mahalanobis distance Intermediate distance Cluster analysis Dendrogram |
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| English abstract: |
| The purpose of this article was to introduce the basic concepts， calculation methods， two examples and the calculation methods using SAS related to the cluster analysis of disordered samples. Basic concepts included the definition of distance between samples， the definition of classes， and the characteristics of classes. The calculation method involved the Mahalanobis distance calculation formula and the intermediate distance calculation formula. The data in the two examples were "survey data reflecting air pollution conditions in 39 cities in the United States" and "measurement results of the percentage content of 16 fatty acids in 24 strains". With the help of SAS software， cluster analysis of disordered samples was performed on the data in the two examples， and the explanation of the SAS output results was given. |
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