PPT-K-means Clustering K-means Clustering

Author : cheryl-pisano | Published Date : 2018-10-31

What is clustering Why would we want to cluster How would you determine clusters How can you do this efficiently Kmeans Clustering Strengths Simple iterative method

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K-means Clustering K-means Clustering: Transcript

What is clustering Why would we want to cluster How would you determine clusters How can you do this efficiently Kmeans Clustering Strengths Simple iterative method User provides K. shan@cs.unc.edu. Clustering Techniques and Applications to Image Segmentation. Roadmap. Unsupervised learning. Clustering categories. Clustering algorithms. K-means. Fuzzy c-means. Kernel-based . Graph-based. Machine . Learning . 10-601. , Fall . 2014. Bhavana. . Dalvi. Mishra. PhD student LTI, CMU. Slides are based . on materials . from . Prof. . Eric Xing, Prof. . . William Cohen and Prof. Andrew Ng. Machine . Learning . 10-601. , Fall . 2014. Bhavana. . Dalvi. Mishra. PhD student LTI, CMU. Slides are based . on materials . from . Prof. . Eric Xing, Prof. . . William Cohen and Prof. Andrew Ng. Lecture outline. Distance/Similarity between data objects. Data objects as geometric data points. Clustering problems and algorithms . K-means. K-median. K-center. What is clustering?. A . grouping. of data objects such that the objects . Machine . Learning . 10-601. , Fall . 2014. Bhavana. . Dalvi. Mishra. PhD student LTI, CMU. Slides are based . on materials . from . Prof. . Eric Xing, Prof. . . William Cohen and Prof. Andrew Ng. David Kauchak. CS . 158. . – Fall . 2016. Administrative. Final project. Presentations on . Tuesday. 4. . minute max. 2. -. 3. slides. . . E-mail me by . 9am . on . Tuesday. What problem you tackled and results. Fuzzy . k. -means. Self-organizing maps. Evaluation of clustering results. Figures and equations from Data Clustering by . Gan. et al.. Center-based clustering. Have objective functions which define how good a solution is;. Unsupervised . learning. Seeks to organize data . into . “reasonable” . groups. Often based . on some similarity (or distance) measure defined over data . elements. Quantitative characterization may include. Lecture outline. Distance/Similarity between data objects. Data objects as geometric data points. Clustering problems and algorithms . K-means. K-median. K-center. What is clustering?. A . grouping. of data objects such that the objects . Chapter 9 Finding Groups of Data – Clustering with k-means Objectives The ways clustering tasks differ from the classification tasks we examined previously How clustering defines a group, and how such groups are identified Object Oriented Data Analysis. J. S. Marron. Dept. of Statistics and Operations Research. University of North Carolina. Support Vector Machines. Motivation:. Find a linear method that . “. works well. Gettysburg College. Laura E. Brown. Michigan . Technological University. Outline. Unsupervised versus Supervised Learning. Clustering Problem. k. -Means Clustering Algorithm. Visual. Example. Worked Example. Department of Biological Sciences. National University of Singapore. http://. www.cs.ucdavis.edu. /~. koehl. /Teaching/BL5229. koehl@cs.ucdavis.edu. Clustering is a hard problem. Many possibilities; What is best clustering ?. clusters. CS771: Introduction to Machine Learning. Nisheeth. K. -means algorithm: . recap. 2. Notation: . or . is a . -dim one-hot vector. (. = 1 and . mean the same). . K-means loss function: recap.

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