content/flux/v0/stdlib/math/frexp.md
math.frexp() breaks f into a normalized fraction and an integral part of two.
It returns frac and exp satisfying f == frac x 2**exp,
with the absolute value of frac in the interval [1/2, 1).
(f: float) => {frac: float, exp: int}
{{% caption %}} For more information, see Function type signatures. {{% /caption %}}
({{< req >}}) Value to operate on.
import "math"
math.frexp(f: 22.0)// {exp: 5, frac: 0.6875}
import "sampledata"
import "math"
sampledata.float()
|> map(
fn: (r) => {
result = math.frexp(f: r._value)
return {r with exp: result.exp, frac: result.frac}
},
)
{{< expand-wrapper >}} {{% expand "View example input and output" %}}
| _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 |
| _time | _value | exp | frac | *tag |
|---|---|---|---|---|
| 2021-01-01T00:00:00Z | -2.18 | 2 | -0.545 | t1 |
| 2021-01-01T00:00:10Z | 10.92 | 4 | 0.6825 | t1 |
| 2021-01-01T00:00:20Z | 7.35 | 3 | 0.91875 | t1 |
| 2021-01-01T00:00:30Z | 17.53 | 5 | 0.5478125 | t1 |
| 2021-01-01T00:00:40Z | 15.23 | 4 | 0.951875 | t1 |
| 2021-01-01T00:00:50Z | 4.43 | 3 | 0.55375 | t1 |
| _time | _value | exp | frac | *tag |
|---|---|---|---|---|
| 2021-01-01T00:00:00Z | 19.85 | 5 | 0.6203125 | t2 |
| 2021-01-01T00:00:10Z | 4.97 | 3 | 0.62125 | t2 |
| 2021-01-01T00:00:20Z | -3.75 | 2 | -0.9375 | t2 |
| 2021-01-01T00:00:30Z | 19.77 | 5 | 0.6178125 | t2 |
| 2021-01-01T00:00:40Z | 13.86 | 4 | 0.86625 | t2 |
| 2021-01-01T00:00:50Z | 1.86 | 1 | 0.93 | t2 |
{{% /expand %}} {{< /expand-wrapper >}}