Σύγκριση μεθόδων

	Δείκτης Calinski-Harabasz	Μέθοδος Αγκώνα
Πεδίο	Αξιολόγηση Μοντέλων	Αξιολόγηση Μοντέλων
Οικογένεια	MCDM	MCDM
Έτος προέλευσης	1974	1953
Δημιουργός	Tadeusz Calinski, Jerzy Harabasz	Robert Thorndike
Τύπος	Cluster quality metric	Heuristic optimization criterion
Θεμελιώδης πηγή	Calinski, T., & Harabasz, J. (1974). A dendrite method for cluster analysis. Communications in Statistics, 3(1), 1-27.	Hastie, T., Tibshirani, R., & Friedman, J. (2009). The Elements of Statistical Learning: Data Mining, Inference, and Prediction. Springer Series in Statistics.
Εναλλακτικές ονομασίες	variance ratio criterion, pseudo F-statistic, CH index	elbow analysis, knee detection
Συναφείς	5	5
Σύνοψη	The Calinski-Harabasz Index, also called the Variance Ratio Criterion, was introduced by Calinski and Harabasz in 1974. It is a metric that measures the ratio of between-cluster variance to within-cluster variance, adjusted for the number of clusters and data points. Higher values indicate better-separated, more compact clusters.	The Elbow Method is a heuristic for selecting the optimal number of clusters in partitional clustering. Introduced by Robert Thorndike in 1953, it involves fitting clustering models for increasing numbers of clusters and plotting the within-cluster sum of squares (WCSS) against the number of clusters. The 'elbow' occurs where the rate of WCSS decrease sharply changes, suggesting an optimal cluster count.