Portail:Probabilités et statistiques. Analyse discriminante linéaire. Un article de Wikipédia, l'encyclopédie libre.
L’analyse discriminante linéaire fait partie des techniques d’analyse discriminante prédictive. Il s’agit d’expliquer et de prédire l’appartenance d’un individu à une classe (groupe) prédéfinie à partir de ses caractéristiques mesurées à l’aide de variables prédictives. K-means clustering. K-means clustering is a method of vector quantization, originally from signal processing, that is popular for cluster analysis in data mining. k-means clustering aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest mean, serving as a prototype of the cluster.
This results in a partitioning of the data space into Voronoi cells. The problem is computationally difficult (NP-hard); however, there are efficient heuristic algorithms that are commonly employed and converge quickly to a local optimum.