| Hu Chunyan,Hu Liangping,Cluster analysis of disordered samples： based on the methods of the first set of distances and the Ward's method[J].SICHUAN MENTAL HEALTH,2024,37(S1):71-77 |
| Cluster analysis of disordered samples： based on the methods of the first set of distances and the Ward's method |
DOI：10.11886/scjsws20240310001 |
| English keywords:Nominal variable Ordered variables Interval variables Ratio variables Hierarchical cluster analysis |
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| The purpose of this article was to introduce the basic concepts， calculation methods， two examples and the implementation of SAS calculation methods related to the cluster analysis of disordered samples. The basic concepts included nominal variables， ordered variables， qualitative variables， interval variables ratio variables and distance. The calculation methods involved the first set of 15 distance calculation formulas and the Ward's method calculation formula for measuring the distance between two clusters of samples. The data in the two examples were "physical morphology data of 16-year-old boys from 27 ethnic minorities in China" and "labor health supervision data from 14 provinces and municipalities in China in 1995". Using SAS software， Cluster analysis of disordered samples was performed on the data from two instances， and the SAS output results were explained. |
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