experimental.integral() function

experimental.integral() computes the area under the curve per unit of time of subsequent non-null records.

The curve is defined using _time as the domain and record values as the range.

Input tables must have _start, _stop, _time, and _valuecolumns._startand_stop` must be part of the group key.

Function type signature

(<-tables: stream[{A with _value: B, _time: time}], ?interpolate: string, ?unit: duration) => stream[{A with _value: B}]

Parameters

unit

Time duration used to compute the integral.

interpolate

Type of interpolation to use. Default is "" (no interpolation).

Use one of the following interpolation options:

• empty string ("") for no interpolation
• linear

tables

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

Examples

• Calculate the integral
• Calculate the integral with linear interpolation

Calculate the integral

import "experimental"
import "sampledata"

data =
    sampledata.int()
        |> range(start: sampledata.start, stop: sampledata.stop)

data
    |> experimental.integral(unit: 20s)

Calculate the integral with linear interpolation

import "experimental"
import "sampledata"

data =
    sampledata.int()
        |> range(start: sampledata.start, stop: sampledata.stop)

data
    |> experimental.integral(unit: 20s, interpolate: "linear")