Instant Heat Maps in R How-to

Bringing your data to life (Advanced)

We learned how to create heat maps, customize them, and save them as image files. Now, it is time to go a step further and add some interactivity for displaying them on the Web. In this recipe, we will learn how to manipulate heat map-containing SVG files to add a nice hover effect and fade-in tool tips using CSS. Further, we will see how to embed our heat map in HTML files, and make use of JavaScript to add further interactivity.

The following screenshot was captured from a Safari web browser after applying the hover effect to our SVG image. Notice the highlighted cell under the mouse pointer:

Getting ready