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dc.contributor.authorWard, Matthew O.en_US
dc.contributor.authorGuo, Zhenyuen_US
dc.contributor.editorH. Hauser, H. Pfister, and J. J. van Wijken_US
dc.date.accessioned2014-02-21T20:23:22Z
dc.date.available2014-02-21T20:23:22Z
dc.date.issued2011en_US
dc.identifier.issn1467-8659en_US
dc.identifier.urihttp://dx.doi.org/10.1111/j.1467-8659.2011.01919.xen_US
dc.description.abstractTime-series data is a common target for visual analytics, as they appear in a wide range of application domains. Typical tasks in analyzing time-series data include identifying cyclic behavior, outliers, trends, and periods of time that share distinctive shape characteristics. Many methods for visualizing time series data exist, generally mapping the data values to positions or colors. While each can be used to perform a subset of the above tasks, none to date is a complete solution. In this paper we present a novel approach to time-series data visualization, namely creating multivariate data records out of short subsequences of the data and then using multivariate visualization methods to display and explore the data in the resulting shape space. We borrow ideas from text analysis, where the use of N-grams is a common approach to decomposing and processing unstructured text. By mapping each temporal N-gram to a glyph, and then positioning the glyphs via PCA (basically a projection in shape space), many different kinds of patterns in the sequence can be readily identified. Interactive selection via brushing, in conjunction with linking to other visualizations, provides a wide range of tools for exploring the data. We validate the usefulness of this approach with examples from several application domains and tasks, comparing our methods with traditional time-series visualizations.en_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltd.en_US
dc.subjectInformation Interfaces and Presentation [H.5.2]en_US
dc.subjectUser Interfacesen_US
dc.subjectGraphical user interfacesen_US
dc.titleVisual Exploration of Time-Series Data with Shape Space Projectionsen_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume30en_US
dc.description.number3en_US


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