block by alansmithy 6fd2625d3ba2b6c9ad48

Heatmap Calendar in d3js

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###Calendar heatmap

A calendar heatmap using a simple csv file structure of date and value. These kinds of displays are good for highlighting patterns in time series data where there might be multiple time patterns present - i.e. daily/weekly/monthly/seasonal. A great implementation of this kind of graphic is the Wisconsin crash calendar.

This particular implementation produces just one svg element with a discrete group element for every year referenced in the data set.