`math stddev` for math

Returns the standard deviation of a list of numbers, or of each column in a table.

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
1.4142135623730951

Compute the sample standard deviation of a list of numbers.

> [1 2 3 4 5] | math stddev --sample
1.5811388300841898

Compute 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.