Learn about the shortcomings of DC bubbleOverlay, and see how to create same effect on a DC geoChoroplethChart using D3 to create the overlay.
- [Instructor] One of the few remaining classes…that we haven't looked at yet is the bubbleOverlay class.…And the point of this class is to position circles…on top of an existing chart, and then size the circles…according to a value. So in this example,…this is a bubbleOverlay, and the circles are sized…by some crime statistic for Canada.…But this example is rather misleading,…because here we have a map of Canada…with bubbleOverlay on top of it.…
And so you would think that we're using…a DC geo choropleth chart here,…with bubbleOverlay on top of it.…And in fact it turns out that's not possible.…The bubbleOverlay class will only work…on top of charts that use the coordinateGridMixin.…And the shortcut for working that out is…whether they have axes or not.…So a chart, such as a bar chart or a line chart…that has a X and a Y axis is bubbleOverlay's friend.…But a map like this does not, and therefore will not.…
So you might ask yourself how then…this graphic has been created. And it turns out…that somebody has specified all of the path elements…
- Downloading and setting up DC.js
- Building dashboards
- Making charts: bar, area, pie, bubble, boxplot, and series
- Applying graphical filtering
- Working with dates
- Restyling dashboards
- Using D3 charts in a DC dashboard
- Linking charts together
Skill Level Intermediate
Crossfilter for Data Science Essential Trainingwith Emma Saunders1h 33m Intermediate
D3.js Essential Training for Data Scientistswith Emma Saunders4h 38m Intermediate
Data Visualization Tips and Trickswith Matt Francis2h 14m Intermediate
1. Preparing to Code in DC
2. Individual Charts
3. Making Advanced Charts
4. Building a Dashboard
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