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Informatie visualisatie: Les 5
Joris Klerkx - Erik Duval http://hci.cs.kuleuven.be [email protected]
Human-Computer InteractionDept. ComputerwetenschappenKU Leuven
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Tegen deze week• Individueel:
• Spreadsheet
• infovis van de week:
• Relevante infovis (inhoud, techniek, etc) voor je eigen project. Wat leer je eruit?
• Per team:
• Slides online plaatsen
• Blogpost - wat geleerd uit feedback, hoe rekening houden ermee? prioritiseer en maak planning
• Implementatie / data verzamelen
• Show & Tell - feedback per groep
• Focus op vragen over de data & de inzichten die je hoopt te winnen
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A tour through the visualization zoo
Heer,J.,Bostock,M.,&Ogievetsjy,V.(2010,May).ATourthroughtheVisualizaConZoo-AsurveyofpowerfulvisualisaContechniques,fromtheobvioustotheobscure.ACMGraphics,8(5),hNps://queue.acm.org/detail.cfm?id=1805128
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Time-series dataSets of values changing over time
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Relative changes in time-series data
An index chart is an interactive line chart that shows percentage changes for a collection of time-series data based on a selected index point.
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Aggregated time-series data
A stream graph visually summates time-series values
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Time-series data
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Time-series data
Small multiples: showing each series in its own chart.
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https://augmenthuman.wordpress.com/portfolio/visualizing-gaming-trends-on-steam/
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http://bl.ocks.org/oyyd/859fafc8122977a3afd6
Day-Hours Heatmap
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The horizon graph is a technique for increasing the data density of a time-series view while preserving resolution.
Sizing the Horizon: The Effects of Chart Size and Layering on the Graphical Perception of Time Series Visualizations Jeffrey Heer, Nicholas Kong, Maneesh Agrawala ACM Human Factors in Computing Systems (CHI), 2009. pp. 1303 - 1312. Best Paper Award PDF (442K)
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http://homes.cs.washington.edu/~jheer//files/zoo/ex/time/horizon.html
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http://www.perceptualedge.com/blog/?p=390
A year’s worth of stock prices for 50 separate stocks
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Tijdens lezen artikel: ‘kippenvel’ ?
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http://neuralengr.com/asifr/journals/
Publication counts over time
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Statistical DistributionsReveal how a set of numbers is distributed and thus help an analyst better understand the statistical properties of the data
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Histograms shows the prevalence of values grouped into bins
Histogram sliders
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A stem-and-leaf plot bins numbers according to the first significant digit, and then stacks the values within each bin by the second significant digit.
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http://thesocietypages.org/graphicsociology/2012/11/18/stem-and-leaf-diagrams/
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Box-and-whisker plot, which can convey statistical features such as the mean, median, quartile boundaries, or extreme outliers.
http://admin-apps.webofknowledge.com/JCR/help/h_boxplot.html
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Statistical distribution of data
The Q-Q plot compares two probability distributions by graphing their quantiles against each other.
http://hci.stanford.edu/jheer/files/zoo/ex/stats/qqplot.html
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Representing relationships/correlations among multiple variables.
A scatter plot matrix (SPLOM) uses small multiples of scatter plots showing a set of pairwise relations among variables
http://homes.cs.washington.edu/~jheer//files/zoo/ex/stats/splom.html
graphing every pair of variables in two dimensions
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http://homes.cs.washington.edu/~jheer//files/zoo/ex/stats/parallel.html
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MapsMostly based upon a cartographic projection: a mathematical function that maps the three-dimensional geometry of the Earth to a two-dimensional image
Other maps knowingly distort or abstract geographic features to tell a richer story or highlight specific data.
http://geoawesomeness.com/topics/web-maps/http://unfoldingmaps.orghttp://ffffound.com/home/tillnm/found/
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• Google Maps - Well rounded, established mapping solution, especially for non-developers to get a basic map on the web, along with all the powers that Google is (in)famous for.
• OpenLayers - For situations when other mapping frameworks can’t solve your spatial analysis problems.
• Leaflet - Currently, easily the best mapping framework for general mapping purposes, especially if you don’t need the additional services that MapBox or CartoDB provide.
• MapBox - Fast growing and market changing mapping solution for when you want more control over map styling or have a need for services that others are not providing, such as detailed satellite images, geocoding or directions.
• Unfolding - to create interactive maps and geovisualizations in Processing and Javahttp://www.toptal.com/web/the-roadmap-to-roadmaps-a-survey-of-the-best-online-mapping-tools
Typical Mapping Tools
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http://en.wikipedia.org/wiki/John_Snow
_(physician)#/media/File:Snow-cholera-map-1.jpg
John Snow, Cholera, 1854
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Charles Joseph Minard, 1781-1870 Napoleon’s Russian Campaign
A flow map depicts the movement of a quantity in space and (implicitly) in time.
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https://lirias.kuleuven.be/bitstream/123456789/461689/1/paper234_camera-ready.pdf
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http://homes.cs.washington.edu/~jheer//files/zoo/ex/maps/choropleth.html
Choropleth Maps use color encoding to show aggregated data by geographical areas
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Choropleth maps using 2 categories
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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Choropleth maps using 5 categories
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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Choropleth maps using 9 categories
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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Choropleth maps using different ranging methods
Equal Range
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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User Defined Range
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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Quantile Range
http://www.colorado.edu/geography/gcraft/notes/cartocom/section6.html
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Graduated Symbol Maps places symbols/glyphs over an underlying map
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Graduated Symbol Maps places symbols over an underlying map
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A cartogram distorts the shape of geographic regions so that the area directly encodes a data variable
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Another cartogram?
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There is no perfect map
How could you actually compare sizes of different continents and countries?
https://www.youtube.com/watch?v=KUF_Ckv8HbE
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HierachiesMost data can be organised into natural hierarchies
Special visualization techniques exist to leverage hierarchical structure, allowing rapid multiscale inferences: micro-observations of individual elements and macro-observations of large groups
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Indented tree layout
http://homes.cs.washington.edu/~jheer//files/zoo/ex/hierarchies/indent.html
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A node-link diagram with Reingold-Tilford algorithmht
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The dendrogram (or cluster) algorithm places leaf nodes of the tree at the same level
Polar coordinates instead of cartesian coordinates
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The adjacency diagram is a space-filling variant of the node-link diagram; rather than drawing a link between parent and child in the hierarchy, nodes are drawn as solid areas (either arcs or bars), and their placement relative to adjacent nodes reveals their position in the hierarchy
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The sunburst layout, shown in figure 4E, is equivalent to the icicle layout, but in polar coordinates. ht
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Polar Area Diagram
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Enclosure diagrams use containment rather than adjacency to represent the hierarchy
Squarified Treemaps - space filling http
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Circle-packing layoutNon - space filling
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NetworksNon-hierarchical relationships between data points
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https://queue.acm.org/detail.cfm?id=1805128
A force-directed layout where nodes are charged particles that repel each other, and links are dampened springs that pull related nodes together.
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lAn arc diagram uses a one-dimensional layout of nodes, with circular arcs to represent links.
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http://www.youtube.com/watch?v=wQpTM7ASc-w
T. Nagel, M. Maitan, E. Duval, A. Vande Moere, J. Klerkx, K. Kloeckl, and C. Ratti. Touching transport - a case study on visualizing metropolitan public transit on interactive tabletops. In AVI2014: 12th ACM International Working Conference on Advanced Visual Interfaces, pages 281–288, 2014.
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Adjacency matrix: each value in row i and column j in the matrix corresponds to the link from node i to node j.
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Chord diagrams show directed relationships among a group of entities. Relationship can be quantitative or binary
http://bl.ocks.org/mbostock/4062006 Ye L, Amberg J, Chapman D et al. 2013 Fish gut microbiota analysis differentiates physiology and behavior of invasive Asian carp and indigenous American fish The ISME journal
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A Circo
http://circos.ca/guide/tables/img/guide-table-large.png
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Choices of representation (e.g., matrix- diagram) and interactive parameterization (e.g., default sort order) can be critical to unearthing data quality issues that can otherwise undermine accurate analysis.
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Many(!!) more techniques are out there
e.g. check the visual index at https://github.com/mbostock/d3/wiki/Gallery
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http://www.visual-literacy.org/periodic_table/periodic_table.html
https://eagereyes.org/blog/2009/
visualization-is-not-periodic-html
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Tegen volgende week• Individueel:
• Spreadsheet
• infovis van de week:
• Relevante infovis (inhoud, techniek, etc) voor je eigen project. Wat leer je eruit?
• Team:
• Vervolg implementatie
• Show-and-Tell - obv online visualisatie (cfr vorige slide)
• vooruitgang - problemen - planning - etc.
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