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Novel Graph Based Clustering and Visualization Algorithms for Data
Novel Graph Based Clustering and Visualization Algorithms for Data

... the most effective methods for exploring useful information from large data sets. Clustering, as a special area of data mining is, one of the most commonly used methods for discovering the hidden structure of the considered data set. The main goal of clustering is to divide objects into well separat ...
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Origins and extensions of the k-means algorithm in cluster analysis
Origins and extensions of the k-means algorithm in cluster analysis

... in a broad scientific community, in statistics, data analysis, and - in particular - in applications. One of the major clustering approaches is based on the sum-of-squares (SSQ) criterion and on the algorithm that is today well-known under the name ’kmeans’. When tracing back this algorithm to its or ...
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IOSR Journal of Computer Engineering (IOSR-JCE)

... dimensional numeric attributes. Each sample represents a point in an n-dimensional space. In this way, all of the training samples are stored in an n-dimensional pattern space. When given an unknown sample, a k-nearest neighbor classifier searches the pattern space for the k training samples that ar ...
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... remains a challenging task [2]. Intuitively, the clustering task can be stated as follows: given a set of n objects, a clustering algorithm tries to partition these objects into k groups so that objects within the same group are alike while objects in different groups are not alike. However, the def ...
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Clustering methods for Big data analysis
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... the current partition. The centroid is the center (mean point) of the cluster. 3. Assign each object to the cluster with the nearest seed point. 4. Go back to Step 2, stop when no more new assignment (or fractional drop of SSE or MSE is less than a threshold). ...
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WK01311891199

... instead of a single centroid, multiple representative points from each cluster are used to label the remainder of the data set. The problems with BIRCH’s labeling phase are eliminated by assigning each data point to the cluster containing the closest representative point. Overview: The steps involve ...
csi - IIT Bombay
csi - IIT Bombay

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Unformatted Manuscript - ICMC
Unformatted Manuscript - ICMC

... UTO-HDS [1] is an interesting clustering framework that can be used to discover relevant data clusters from biological data sets. It is composed of a clustering stage, a cluster ranking and selection stage, and a visualization stage. The clustering stage is based on the HDS algorithm, proposed by th ...
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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. These are usually similar to the expectation-maximization algorithm for mixtures of Gaussian distributions via an iterative refinement approach employed by both algorithms. Additionally, they both use cluster centers to model the data; however, k-means clustering tends to find clusters of comparable spatial extent, while the expectation-maximization mechanism allows clusters to have different shapes.The algorithm has a loose relationship to the k-nearest neighbor classifier, a popular machine learning technique for classification that is often confused with k-means because of the k in the name. One can apply the 1-nearest neighbor classifier on the cluster centers obtained by k-means to classify new data into the existing clusters. This is known as nearest centroid classifier or Rocchio algorithm.
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