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### Interactivity  A simple interactive figure gives its user an experience of playing with data, but in a very limited sandbox. Many top-tier news agencies (e. g. *The New York Times*) have done a lot of this work, used  and the helped develop  technology is now getting easier to use (e.g. the javascript library known as [d3](http://d3js.org)) that allows for the creation of interactive figures  without a need for  dedicated developers. Three key features of the emerging paradigm for ineractive communication of quantitative information are **Brushing**, **Linking**, and **Staging**. * **Brushing** is the idea of being able to select, with a box or lasso like tool, a subset of the points in a one- or two- dimensional space.