Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient
The literature presents many methods for partitioning of data set, and is difficult choose which is the most suitable, since the various combinations of methods based on different measures of dissimilarity can lead to different patterns of grouping and false interpretations. Nevertheless, little ef...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2019-02-01
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| Series: | Brazilian Journal of Radiation Sciences |
| Subjects: | |
| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/668 |
| _version_ | 1811338165318844416 |
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| author | Priscilla Ramos Carvalho Casimiro Sepúlveda Munita André Luiz Lapolli |
| author_facet | Priscilla Ramos Carvalho Casimiro Sepúlveda Munita André Luiz Lapolli |
| author_sort | Priscilla Ramos Carvalho |
| collection | DOAJ |
| description |
The literature presents many methods for partitioning of data set, and is difficult choose which is the most suitable, since the various combinations of methods based on different measures of dissimilarity can lead to different patterns of grouping and false interpretations. Nevertheless, little effort has been expended in evaluating these methods empirically using an archaeological data set. In this way, the objective of this work is make a comparative study of the different cluster analysis methods and identify which is the most appropriate. For this, the study was carried out using a data set of 45 samples of ceramic fragments, analyzed by instrumental neutron activation analysis (INAA). The methods used for this study were: Single linkage, Complete linkage, Average linkage, Centroid and Ward. The validation was done using the cophenetic correlation coefficient and comparing these values the average linkage method obtained better results. A script of the statistical program R with some functions was created to obtain the cophenetic correlation. By means of these values was possible to choose the most appropriate method to be used in the data set.
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| first_indexed | 2024-04-13T18:06:57Z |
| format | Article |
| id | doaj.art-e57f8c764a5e4e028b2d67c524ac1888 |
| institution | Directory Open Access Journal |
| issn | 2319-0612 |
| language | English |
| last_indexed | 2024-04-13T18:06:57Z |
| publishDate | 2019-02-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj.art-e57f8c764a5e4e028b2d67c524ac18882022-12-22T02:36:03ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122019-02-0172A10.15392/bjrs.v7i2A.668Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficientPriscilla Ramos CarvalhoCasimiro Sepúlveda MunitaAndré Luiz Lapolli The literature presents many methods for partitioning of data set, and is difficult choose which is the most suitable, since the various combinations of methods based on different measures of dissimilarity can lead to different patterns of grouping and false interpretations. Nevertheless, little effort has been expended in evaluating these methods empirically using an archaeological data set. In this way, the objective of this work is make a comparative study of the different cluster analysis methods and identify which is the most appropriate. For this, the study was carried out using a data set of 45 samples of ceramic fragments, analyzed by instrumental neutron activation analysis (INAA). The methods used for this study were: Single linkage, Complete linkage, Average linkage, Centroid and Ward. The validation was done using the cophenetic correlation coefficient and comparing these values the average linkage method obtained better results. A script of the statistical program R with some functions was created to obtain the cophenetic correlation. By means of these values was possible to choose the most appropriate method to be used in the data set. https://bjrs.org.br/revista/index.php/REVISTA/article/view/668cluster analysiscophenetic correlation coefficientINAA. |
| spellingShingle | Priscilla Ramos Carvalho Casimiro Sepúlveda Munita André Luiz Lapolli Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient Brazilian Journal of Radiation Sciences cluster analysis cophenetic correlation coefficient INAA. |
| title | Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| title_full | Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| title_fullStr | Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| title_full_unstemmed | Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| title_short | Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| title_sort | validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient |
| topic | cluster analysis cophenetic correlation coefficient INAA. |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/668 |
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