R: Unbiased standard deviation

usd {MESS} | R Documentation

## Unbiased standard deviation

### Description

This function computes the unbiased standard deviation of the values in x. If `na.rm` is TRUE then missing values are removed before computation proceeds.

### Usage

    usd(x, na.rm = FALSE)

### Arguments

`x` | a numeric vector or an R object but not a factor coercible to numeric by as.double(x)
`na.rm` | logical. Should missing values be removed?

### Details

Like var this uses denominator n - 1. The standard deviation of a length-one or zero-length vector is NA.

### Value

A scalar

### Examples

    sd(1:5)
    usd(1:5)

[Package MESS version 0.5.9 Index]