std

Calculates the standard deviation of an array of numbers.

Syntax

std(numbers: number[]): number

Parameters

Name	Type	Description
numbers	number[]	Array of numbers to calculate std.

Return

Type	Description
number	The standard deviation of the values.

Example

std([2, 4, 4, 4, 5, 5, 7, 9]); // 2
std([1, 2, 3, 4, 5]); // 1.4142135623730951

Notes

• Throws TypeError if the argument is not an array of numbers.
• Returns NaN for an empty array.
• Uses the sample standard deviation formula.

References

• Wikipedia: Standard deviation