A clustering approach applicable to every projection method is proposed here [Thrun/Ultsch,2017] <DOI:10.13140/RG.2.2.13124.53124>. The twodimensional scatter plot of any projection method can construct a topographic map which displays unapparent data structures by using distance and density information of the data. The generalized U*matrix renders this visualization in the form of a topographic map, which can be used to automatically define the clusters of highdimensional data. The whole system is based on the book "ProjectionBased Clustering through SelfOrganization and Swarm Intelligence" <DOI:10.1007/9783658205409>. Selecting the correct projection method will result in a visualization in which mountains surround each cluster. The number of clusters can be determined by counting valleys on the topographic map. Most projection methods are wrappers for already available methods in R. By contrast, the neighbor retrieval visualizer (NeRV) is based on C++ source code of the 'dredviz' software package, and the Curvilinear Component Analysis (CCA) is translated from 'MATLAB' ('SOM Toolbox' 2.0) to R.
Package details 


Author  Michael Thrun [aut, cre, cph], Florian Lerch [aut], Felix Pape [aut], Kristian Nybo [cph], Jarkko Venna [cph] 
Maintainer  Michael Thrun <[email protected]> 
License  GPL3 
Version  1.0.7 
URL  http://www.deepbionics.org 
Package repository  View on CRAN 
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