Function
| Arg | Description | Type |
|---|---|---|
| x | The X float | float64 (required) |
| y | The Y float | float64 (required) |
Calculates the rate (derivative) between two quantities.
For example if a monitoring plugin returns an absolute value sampled in time (e.g. bytes transferred sampled every second) then the rate() plugin can calculate the average bytes/sec.
This function works by remembering the values of x and y from the previous row and applying the current rows values.