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PPT - UNL CSE
PPT - UNL CSE

... – Much of the work uses linear regression models – Assumes stationarity over time – Change point detection (e.g El Nino became more frequent in1980s) – Need to break up the time into smaller slices ...
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Department of Statistics STATS 784SC Statistical Data Mining Study
Department of Statistics STATS 784SC Statistical Data Mining Study

... the time, and students are expected to look there every time they log on to the computer. The site contains data sets, announcements, hints, office hours, etc. Computer Work We will use R, not because it’s the best for data mining, but because it’s elegant, free and allows the statistical aspects of ...
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Chapter26 - members.iinet.com.au
Chapter26 - members.iinet.com.au

...  related to subarea of statistics called exploratory data analysis  distinguishing characteristic of data mining is that the volume of data is very large Knowledge discovery process 1. Data selection : identify subset of data and attributes of interest by examining raw data set 2. Data cleaning : ...
NII International Internship Project
NII International Internship Project

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... outliers and/or regular instances. Among these categories, unsupervised methods are more widely applied because the other categories require accurate and representative labels that are often prohibitively expensive to obtain.  Unsupervised methods include distance-based methods that mainly rely on ...
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Location: Fakultet organizacionih nauka Univerziteta u Beogradu

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Nonlinear dimensionality reduction



High-dimensional data, meaning data that requires more than two or three dimensions to represent, can be difficult to interpret. One approach to simplification is to assume that the data of interest lie on an embedded non-linear manifold within the higher-dimensional space. If the manifold is of low enough dimension, the data can be visualised in the low-dimensional space.Below is a summary of some of the important algorithms from the history of manifold learning and nonlinear dimensionality reduction (NLDR). Many of these non-linear dimensionality reduction methods are related to the linear methods listed below. Non-linear methods can be broadly classified into two groups: those that provide a mapping (either from the high-dimensional space to the low-dimensional embedding or vice versa), and those that just give a visualisation. In the context of machine learning, mapping methods may be viewed as a preliminary feature extraction step, after which pattern recognition algorithms are applied. Typically those that just give a visualisation are based on proximity data – that is, distance measurements.
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