• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
On the Number of Clusters in Block Clustering
On the Number of Clusters in Block Clustering

... knowledge to know what a good clustering ”looks” like, the result of clustering needs to be validated in most applications. The procedure for evaluating the results of a clustering algorithm is known under the term cluster validity. In general terms, there are three approaches to investigate cluster ...
Adaptive Optimization of the Number of Clusters in Fuzzy Clustering
Adaptive Optimization of the Number of Clusters in Fuzzy Clustering

Compiler Techniques for Data Parallel Applications With Very Large
Compiler Techniques for Data Parallel Applications With Very Large

... Already demonstrated for a variety of standard mining algorithms Working for feature analysis and mining of simulation data currently ...
pptx - University of Hawaii
pptx - University of Hawaii

Review Questions for September 23
Review Questions for September 23

... Assume we have a dataset in which the median of the first attribute is twice as large as the mean of the first attribute? What does this tell you about the distribution of the first attribute? What is (are) the characteristic(s) of a good histogram (for an attribute)? Assume you find out that two at ...
DISTANCE BASED CLUSTERING OF ASSOCIATION RULES вбдге
DISTANCE BASED CLUSTERING OF ASSOCIATION RULES вбдге

Comparison of K-means and Backpropagation Data Mining Algorithms
Comparison of K-means and Backpropagation Data Mining Algorithms

... used to evaluate the clustering and classification algorithms is the accuracy. Accuracy is determined as the ratio of records correctly classified during testing to the total number of records tested. The clusters formed were verified for correctness to know the error. The details of the applicants ...
Improved Hierarchical Clustering Using Time Series Data
Improved Hierarchical Clustering Using Time Series Data

... management has become a hot research topic due to its wide application usage. A data stream is an structured sequence of points x1, , , , , , , xn that must be accessed in order and that can be read only once or a small number of time. The new high speed data set will not adopt by the traditional al ...
Fa: A System for Automating Failure Diagnosis
Fa: A System for Automating Failure Diagnosis

...  Fa uses a new technique called anomaly-based clustering when the signature database has no highconfidence match for an undiagnosed failure ...
Text Clustering - Indian Statistical Institute
Text Clustering - Indian Statistical Institute

... Aglommerative (bottom-up) methods start with each example as a cluster and iteratively combines them to form larger and larger clusters. ...
Wong Lim Soon
Wong Lim Soon

A new efficient approach for data clustering in electronic library
A new efficient approach for data clustering in electronic library

... group is not known. Clustering is a way to naturally segment data into groups, whereas classification is a way to segment data by assigning it into groups. Briefly, a good clustering method will produce high quality clusters with high intra-class similarity and low inter-class similarity. However, h ...
Data Mining & Analysis
Data Mining & Analysis

Comparison and Analysis of Various Clustering Methods
Comparison and Analysis of Various Clustering Methods

Deterministic Annealing and Robust Scalable Data Mining for the
Deterministic Annealing and Robust Scalable Data Mining for the

IEEE Paper Template in A4 (V1) - International Journal of Computer
IEEE Paper Template in A4 (V1) - International Journal of Computer

... data element and a particular cluster. Fuzzy clustering is a process of assigning these membership levels, and then using them to assign data elements to one or more clusters. Elkan et al. 2003[6] proposed some methods to speed up each k-means step using corsets or the triangle inequality. It shows ...
Database Systems: Design, Implementation, and Management
Database Systems: Design, Implementation, and Management



... a set of observations/events: find the maximum likelihood estimates of the set of Gaussian Mixture parameters (µ, σ ,π) and classify observations   Expectation Maximization (EM) Algorithm ...
Detecting Clusters in Moderate-to-High Dimensional Data
Detecting Clusters in Moderate-to-High Dimensional Data

Clustering Text Documents: An Overview
Clustering Text Documents: An Overview

... each partition is represented by a cluster with k ≤ n. The clusters are formed taking into account the optimization of a criterion function. This function expresses the dissimilarity between the objects, so that the objects that are grouped into a cluster are similar and objects from different clust ...
Final-16-sol
Final-16-sol

... Examples in the original attribute space are mapped into a higher dimensional attribute space and a hyperplane are learnt to separate classes in the mapped attribute space [2]. In a higher dimensional space, there are many more hyperplane to separate the two classes, making it more likely to find “b ...
K-means with Three different Distance Metrics
K-means with Three different Distance Metrics

Clustering Algorithms: Study and Performance
Clustering Algorithms: Study and Performance

... collection of data items in to clusters, such items within a cluster are more similar to each other then they are in other clusters. They used k-means & k-mediod clustering algorithms and compare the performance evaluation of both with IRIS data on the basis of time and space complexity. In this inv ...
Spam Outlier Detection in High Dimensional Data: Ensemble
Spam Outlier Detection in High Dimensional Data: Ensemble

... Flora Institute of Technology, Pune, Maharashtra, India Abstract— High Dimensional data is need of world as social networking sites, biomedical data, sports, etc. Many data sets are represented with hundreds or thousands of dimensions. Dimensions are increasing, so due to “Curse of Dimensionality”, ...
Introduction to Predictive Analytcs
Introduction to Predictive Analytcs

< 1 ... 134 135 136 137 138 139 140 141 142 ... 169 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report