Data Visualization. Lecture 8. Data Visualization. Historically, data visualization served to make hidden relationships comprehensible or complex ones visible. The advent of informatics tools has let scientists. easily and rapidly generate of visualizations;
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Historically, data visualization served to make hidden relationships comprehensible or complex ones visible.
The advent of informatics tools has let scientists
Moreover these tools serve as cognitive aids, reducing the need to hold multiple data representations in memory.
John Snow’s (1854) plot of cholera deaths illustrated the link between cholera and the Broad Street water pump.
Charles Minard’s (1869) map of Napolean’s Russian campaign illustrates the extent of his army’s loss.
Scientists across disciplines rely on software that displays the structure, dynamics, and interactions in their data.
Informatics tools may specialize on a particular type of data or a particular scientific field, as with
Other informatics software provides general charting and plotting capabilities.
mri3dX analyzes and displays voxel data from MRIs.
ArcGIS lets scientists display and analyze data with important geospatial components.
Viewing the land use of a region.
Laying historical tornado paths on urban maps.
VMD displays complex molecular systems from x-ray diffraction and nuclear magnetic resonance data sets.
Karma displays and analyzes astronomical data.
Spotfire displays high dimensional data, such as the microarray data set shown below, in multiple modes.
Many Eyes encourages collaborative visualization and interpretation of data sets.
Users upload data in tab-delimited formats and have access to several chart and graph options including
The web site includes features for
Motion charts plot multi-dimensional time series data and animate their dynamics.
Motion charts are accessible through Google Docs, Google Gadgets, and the Google Visualization API.
View examples online at