rate

(DOC) Maps each segment into its derivative.

The result is scaled according to the unit argument. If a segment increases at a rate of 1 per second, and unit is Duration.SECOND, the derivative will be 1. But if (for the same segment) unit is Duration.MINUTE, the derivative will be 60.

In fancy math terms, unit is the length of the time basis vector, and the result is covariant with it.

Parameters