GTM-based data visualisation with incomplete data


We analyse how the Generative Topographic Mapping (GTM) can be modified to cope with missing values in the training data. Our approach is based on an Expectation -Maximisation (EM) method which estimates the parameters of the mixture components and at the same time deals with the missing values. We incorporate this algorithm into a hierarchical GTM. We verify the method on a toy data set (using a single GTM) and a realistic data set (using a hierarchical GTM). The results show our algorithm can help to construct informative visualisation plots, even when some of the training points are corrupted with missing values.

Divisions: ?? 50811700Jl ??
College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Uncontrolled Keywords: Generative Topographic Mapping (GTM),missing values,Expectation -Maximisation (EM),hierarchical,visualisation plots
ISBN: NCRG/2001/013
Last Modified: 27 Jun 2024 11:55
Date Deposited: 14 Sep 2009 13:35
PURE Output Type: Technical report
Published Date: 2001
Authors: Sun, Yi
Tino, Peter
Nabney, Ian T. (ORCID Profile 0000-0003-1513-993X)


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