math stddev
For math.
Returns the standard deviation of a list of numbers, or of each column in a table.
Command Type
built-in
Signature
> math stddev {flags} ...rest
Flags
--sample, -s: Calculate sample standard deviation (i.e. using N-1 as the denominator).
Parameters
...rest: The cell-paths/columns to operate on.
Input/output types:
| input | output |
|---|---|
| list<number> | number |
| list<duration> | duration |
| list<filesize> | filesize |
| range | number |
| table | record |
| record | record |
Examples
Compute the standard deviation of a list of numbers.
> [1 2 3 4 5] | math stddev
1.4142135623730951Compute the sample standard deviation of a list of numbers.
> [1 2 3 4 5] | math stddev --sample
1.5811388300841898Compute the standard deviation of each column in a table.
> [[a b]; [1 2] [3 4]] | math stddev
╭───┬──────╮
│ a │ 1.00 │
│ b │ 1.00 │
╰───┴──────╯Compute the standard deviation of list-valued columns in a record.
> {alice: [1 3], bob: [4 6]} | math stddev
╭───────┬──────╮
│ alice │ 1.00 │
│ bob │ 1.00 │
╰───────┴──────╯Compute the standard deviation of a single column using a cell path.
> {alice: [1 3], bob: [4 6]} | math stddev alice
╭───────┬───────────╮
│ alice │ 1.00 │
│ │ ╭───┬───╮ │
│ bob │ │ 0 │ 4 │ │
│ │ │ 1 │ 6 │ │
│ │ ╰───┴───╯ │
╰───────┴───────────╯Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.