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Digital Library of the
European Council for Modelling and Simulation |
Title: |
Time-Segmented Scatter Plots: A View On Time-Dependent State Relations
In Discrete-Event Time Series |
Authors: |
Arne Koors, Bernd Page |
Published in: |
(2015).ECMS 2015 Proceedings edited
by: Valeri M. Mladenov, Grisha Spasov, Petia Georgieva, Galidiya Petrova, European
Council for Modeling and Simulation. doi:10.7148/2015 ISBN:
978-0-9932440-0-1 29th
European Conference on Modelling and Simulation, Albena (Varna), Bulgaria,
May 26th – 29th,
2015 |
Citation
format: |
Arne
Koors, Bernd Page (2015). Time-Segmented Scatter Plots: A View On Time-Dependent State Relations
In Discrete-Event Time Series, ECMS 2015 Proceedings edited by: Valeri M. Mladenov, Petia Georgieva, Grisha Spasov, Galidiya Petrova European Council for Modeling and Simulation. doi:10.7148/2015-0380 |
DOI: |
http://dx.doi.org/10.7148/2015-0380 |
Abstract: |
Pairs of discrete event time series are
characterised by their asynchronous nature, often
hampering direct application of otherwise common analysis methods. For
correct application of scatter plots, pairs of discrete event time series
first have to be pre-processed and merged into a new synthetic time series of
so-called coobservations. While standard scatter
plots suggest analysis of global state correlation, connected scatter plots support
more sophisticated hypotheses, by including sequence information. The family
of time-segmented scatter plots introduced here additionally contributes time
information, by dividing co-observations into timerelated
coloured segments. Time-segmented scatter plots
permit to correlate co-observation states, state patterns and state
relationships with time intervals, in order to explore time-stability of
state relationships, discover otherwise overlooked dynamic patterns and
possibly detect underlying processes that shape the formation of co-observation
relationships. Enhanced concepts like filtered, tiled or delimited
time-segmented scatter plots are available for unfavourable
conditions like very high number of co-observations, overplotting,
high variance or low autocorrelation. These extensions add visual aids to
focus on the basic nature of co-observation relationships and their possible
development. All concepts introduced in this paper are illustrated by means
of a simple cash and carry warehouse example model. |
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