Namespace Trackers

Trackers are useful for tracking a series of data over time.

• number: Tracks min, max and average of a stream of numbers
• interval: Tracks min, max and average time interval between events
• point: Tracks the spatial change of x,y coordinates. Useful for tracking a mouse cursor, for example.
• points: Tracks changes in multiple x,y coordinates. Useful for tracking each finger touch on a screen, for example.
• frequency: Count occurences of a value