docs-v2/content/flux/v0/stdlib/math/modf.md

title	description	menu	weight
math.modf() function	`math.modf()` returns integer and fractional floating-point numbers that sum to `f`.	flux_v0_ref name parent identifier math.modf math math/modf	101

math.modf() returns integer and fractional floating-point numbers that sum to f.

Both values have the same sign as f.

Function type signature

(f: float) => {int: float, frac: float}

{{% caption %}} For more information, see Function type signatures. {{% /caption %}}

Parameters

f

({{< req >}}) Value to operate on.

Examples

• Return the integer and float that sum to a value
• Use math.modf in map

Return the integer and float that sum to a value

import "math"

math.modf(f: 3.14)// {frac: 0.14000000000000012, int: 3}

Use math.modf in map

import "math"
import "sampledata"

sampledata.float()
    |> map(
        fn: (r) => {
            result = math.modf(f: r._value)

            return {_time: r._time, int: result.int, frac: result.frac}
        },
    )

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Input data

_time	*tag	_value
2021-01-01T00:00:00Z	t1	-2.18
2021-01-01T00:00:10Z	t1	10.92
2021-01-01T00:00:20Z	t1	7.35
2021-01-01T00:00:30Z	t1	17.53
2021-01-01T00:00:40Z	t1	15.23
2021-01-01T00:00:50Z	t1	4.43

_time	*tag	_value
2021-01-01T00:00:00Z	t2	19.85
2021-01-01T00:00:10Z	t2	4.97
2021-01-01T00:00:20Z	t2	-3.75
2021-01-01T00:00:30Z	t2	19.77
2021-01-01T00:00:40Z	t2	13.86
2021-01-01T00:00:50Z	t2	1.86

Output data

_time	frac	int
2021-01-01T00:00:00Z	-0.18000000000000016	-2
2021-01-01T00:00:10Z	0.9199999999999999	10
2021-01-01T00:00:20Z	0.34999999999999964	7
2021-01-01T00:00:30Z	0.5300000000000011	17
2021-01-01T00:00:40Z	0.23000000000000043	15
2021-01-01T00:00:50Z	0.4299999999999997	4
2021-01-01T00:00:00Z	0.8500000000000014	19
2021-01-01T00:00:10Z	0.9699999999999998	4
2021-01-01T00:00:20Z	-0.75	-3
2021-01-01T00:00:30Z	0.7699999999999996	19
2021-01-01T00:00:40Z	0.8599999999999994	13
2021-01-01T00:00:50Z	0.8600000000000001	1

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