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Semi-supervised construction of general visualization hierarchies
(CSREA Press, 2002)
We have recently developed a principled approach to interactive non-linear hierarchical visualization [8] based on the Generative Topographic Mapping (GTM). Hierarchical plots are needed when a single visualization plot ...
Visualization of incomplete data using class information constraints
(Springer Nature, 2002)
We analyse how the training algorithm for the Generative Topographic Mapping (GTM) can be modifed to use class information to improve results on incomplete data. The approach is based on an Expectation-Maximisation (EM) ...
A principled approach to interactive hierarchical non-linear visualization of high-dimensional data
(2001)
Hierarchical visualization systems are desirable because a single twodimensional visualization plot may not be sufficient to capture all of the interesting aspects of complex high-dimensional data sets. We extend an existing ...
Using directional curvatures to visualize folding patterns of the GTM projection manifolds
(2001)
In data visualization, characterizing local geometric properties of non-linear projection manifolds provides the user with valuable additional information that can influence further steps in the data analysis. We take ...