Journal of Data Science, Statistics, and Visualisation https://jdssv.org/index.php/jdssv <p>The journal welcomes contributions to practical aspects of data science, statistics and visualisation, and in particular those which are linking and integrating these subject areas. Papers should thus be oriented towards a very wide scientific audience, and can cover topics such as machine learning and statistical learning, the visualisation and verbalization of data, big data infrastructures and analytics, interactive learning, advanced computing, and other important themes. JDSSV is an open access journal that charges no author fees.</p> en-US editor@jdssv.org (Patrick J.F. Groenen) support@jdssv.org (Alexandre Francisco) Wed, 07 Sep 2022 12:44:25 +0000 OJS 3.3.0.10 http://blogs.law.harvard.edu/tech/rss 60 Network Comparison with Interpretable Contrastive Network Representation Learning https://jdssv.org/index.php/jdssv/article/view/56 <p>Identifying unique characteristics in a network through comparison with another network is an essential network analysis task. For example, with networks of protein interactions obtained from normal and cancer tissues, we can discover unique types of interactions in cancer tissues. This analysis task could be greatly assisted by contrastive learning, which is an emerging analysis approach to discover salient patterns in one dataset relative to another. However, existing contrastive learning methods cannot be directly applied to networks as they are designed only for high-dimensional data analysis. To address this problem, we introduce a new analysis approach called contrastive network representation learning (cNRL). By integrating two machine learning schemes, network representation learning and contrastive learning, cNRL enables embedding of network nodes into a low-dimensional representation that reveals the uniqueness of one network compared to another. Within this approach, we also design a method, named i-cNRL, which offers interpretability in the learned results, allowing for understanding which specific patterns are only found in one network. We demonstrate the effectiveness of i-cNRL for network comparison with multiple network models and real-world datasets. Furthermore, we compare i-cNRL and other potential cNRL algorithm designs through quantitative and qualitative evaluations.</p> Takanori Fujiwara, Jian Zhao, Francine Chen, Yaoliang Yu, Kwan-Liu Ma Copyright (c) 2022 Journal of Data Science, Statistics, and Visualisation https://jdssv.org/index.php/jdssv/article/view/56 Wed, 07 Sep 2022 00:00:00 +0000