elapsed() function

elapsed() returns the time between subsequent records.

For each input table, elapsed() returns the same table without the first row (because there is no previous time to derive the elapsed time from) and an additional column containing the elapsed time.

Function type signature

(<-tables: stream[A], ?columnName: string, ?timeColumn: string, ?unit: duration) => stream[B] where A: Record, B: Record

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Parameters

unit

Unit of time used in the calculation. Default is 1s.

timeColumn

Column to use to compute the elapsed time. Default is _time.

columnName

Column to store elapsed times in. Default is elapsed.

tables

Input data. Default is piped-forward data (<-).

Examples

Calculate the time between points in seconds

import "sampledata"

sampledata.int()
    |> elapsed(unit: 1s)

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Input data

Output data

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