Visualizing Data Over Time

The last chapter discussed using access logs to create data maps representing the geographic location of users. We used the map and mapproj (for map projections) packages to create these visualizations.

This chapter explores creating time series charts, which are graphs that compare changes in values over time. They are generally read left to right with the x-axis representing some measure of time, and the y-axis representing the range of values. This chapter discusses visualizing defects over time.

Tracking defects over time allows us to identify not only spikes in issues but also larger patterns in workflows, ...

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