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. 2015 Aug 25;4:38. doi: 10.1186/s13742-015-0077-2

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© Pavlopoulos et al. 2015

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Multivariate analyses and visualization. a Timeline of the emergence of relevant technologies and concepts. b Visualization of k-means partitional clustering algorithm. c 3D visualization of a principal component analysis. d Visualization of gene-expression measures across time using parallel coordinates. e Visualization of gene-expression clustering across time. f 2D hierarchical clustering to visualize gene expressions against several time points or conditions. g Hypothetical integration of analyses and expression heatmaps and the control of objects by VR devices