Dynamic Mixed Data Analysis and Visualization.

Entropy (Basel)

Department of Economics, Management and Quantitative Methods and Data Science Research Center, University of Milan, 20122 Milano, Italy.

Published: October 2022

One of the consequences of the big data revolution is that data are more heterogeneous than ever. A new challenge appears when mixed-type data sets evolve over time and we are interested in the comparison among individuals. In this work, we propose a new protocol that integrates robust distances and visualization techniques for dynamic mixed data. In particular, given a time t∈T={1,2,…,N}, we start by measuring the proximity of individuals in heterogeneous data by means of a robustified version of Gower's metric (proposed by the authors in a previous work) yielding to a collection of distance matrices {D(t),∀t∈T}. To monitor the evolution of distances and outlier detection over time, we propose several graphical tools: First, we track the evolution of pairwise distances via line graphs; second, a dynamic box plot is obtained to identify individuals which showed minimum or maximum disparities; third, to visualize individuals that are systematically far from the others and detect potential outliers, we use the proximity plots, which are line graphs based on a proximity function computed on {D(t),∀t∈T}; fourth, the evolution of the inter-distances between individuals is analyzed via dynamic multiple multidimensional scaling maps. These visualization tools were implemented in the Shinny application in R, and the methodology is illustrated on a real data set related to COVID-19 healthcare, policy and restriction measures about the 2020-2021 COVID-19 pandemic across EU Member States.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9601934PMC
http://dx.doi.org/10.3390/e24101399DOI Listing

Publication Analysis

Top Keywords

dynamic mixed
8
mixed data
8
data
7
individuals
5
dynamic
4
data analysis
4
analysis visualization
4
visualization consequences
4
consequences big
4
big data
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!