docs-v2/content/flux/v0.x/stdlib/generate/from.md

title	description	menu	flux/v0.x/tags	weight
generate.from() function	`generate.from` generates data using provided parameter values.	flux_0_x_ref name parent generate.from generate	inputs	202

generate.from generates data using provided parameter values.

import "generate"

generate.from(
    count: 5,
    fn: (n) => n,
    start: 2021-01-01T00:00:00Z,
    stop: 2021-01-02T00:00:00Z,
)

Parameters

count

({{< req >}}) Number of rows to generate.

fn

({{< req >}}) Function used to generate values. The function takes an n parameter that represents the row index, operates on n, and then returns an integer value. Rows use zero-based indexing.

start

({{< req >}}) Beginning of the time range to generate values in.

stop

({{< req >}}) End of the time range to generate values in.

Examples

Generate sample data

import "generate"

generate.from(
    count: 6,
    fn: (n) => (n + 1) * (n + 2),
    start: 2021-01-01T00:00:00Z,
    stop: 2021-01-02T00:00:00Z,
)

Output data

_time	_value
2021-01-01T00:00:00Z	2
2021-01-01T04:00:00Z	6
2021-01-01T08:00:00Z	12
2021-01-01T12:00:00Z	20
2021-01-01T16:00:00Z	30
2021-01-01T20:00:00Z	42