2004
DOI: 10.1016/j.aca.2003.12.020
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Selecting variables for k-means cluster analysis by using a genetic algorithm that optimises the silhouettes

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Cited by 191 publications
(102 citation statements)
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“…The silhouette value for each point is a measure of how similar that point is to points in its own cluster compared to points in other clusters [8]. It is defined as:…”
Section: The Proposed Methodsmentioning
confidence: 99%
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“…The silhouette value for each point is a measure of how similar that point is to points in its own cluster compared to points in other clusters [8]. It is defined as:…”
Section: The Proposed Methodsmentioning
confidence: 99%
“…This measure ranges from +1, indicating points that are very distant from neighboring clusters, through 0, indicating points that are not distinctly in one cluster or another, to −1, indicating points that are probably assigned to the wrong cluster [8]. If number of clusters is equal to number of objects, then for every point we would have w(i) = 0 and s(i) = 1.…”
Section: The Proposed Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…A number of similar but more concrete approaches, primarily based on cluster evaluation and assessment, have been proposed (e.g. [16,17]) and reliably incorporated in popular software packages. Computational efficiency of these algorithms is poor as they construct a number of clusters, measure an evaluation metric (e.g.…”
Section: Number Of Clustersmentioning
confidence: 99%
“…O pseudocódigo deste algoritmo segue abaixo. É importante destacar que o algoritmo é iterativo e que, sob uma perspetiva de otimização, o algoritmo k-means preza por minimizar a soma da distância euclidiana ao quadrado entre os objetos dos grupo até seu respectivo centróide, como mostra a Equação 1 (LLETI et al, 2004). …”
Section: K-médiasunclassified