I.e. run k-means, train a SVM on the resulting clusters. k-NN classification, or even assigning each object to the nearest cluster center (option matlab - K-means classification. Through my last blog posting, Digital Analytics Decision Trees; CHAID vs CART, it seems that I piqued the interest of some. One of the. Where is the benefit of doing this? A cluster found by KMeans may contain many different labels, so you decrease quality! Just so nearest-neighbor classification.
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K-means clustering - Wikipedia
K-means is a clustering algorithm that has been used to classify large datasets in astronomical databases. It is an unsupervised method, able to cope very different types of problems.
Implementation I have created a class named clust for this purpose which k means classification initialized takes in a sklearn dataset and divides it into train and test dataset.
The function KMeans applies KMeans clustering to the train data with the number of classes as the number of clusters to be made and creates labels both for train and test data.
Results In the first attempt only clusters found by KMeans are used to train a classification model. The Random Partition k means classification first randomly assigns a cluster to each observation and then proceeds to the update step, thus computing the initial mean to be the centroid of the cluster's randomly assigned points.
The Forgy method tends to spread the initial means out, while Random Partition places all k means classification them close to the center of the data set.
According to Hamerly et al. For expectation maximization and standard k-means algorithms, the Forgy method of initialization is preferable.
- Algorithm - Can k-means clustering do classification? - Stack Overflow
- KMeans Clustering for Classification – Towards Data Science
Tree based methods such as decision trees, random forests, gradient boosted trees Support vector machines Neural nets and deep learning In particular, gradient boosted trees and deep learning are performing very well k means classification Kaggle.
Are there significantly better alternatives in the context where we use k-means? Kdnuggets article on Advanced Data Analytics K-means is used to k means classification clustering problem.