skewness {optimStrat}

Sample Skewness

Description

Calculate the sample skewness.

Usage

skewness(x, na.rm = FALSE)

Arguments

x

a numeric vector.

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

Details

Compute the sample skewness of x as

\frac{\frac{1}{N}\sum_{i=1}^{N}\left(x_{i}-\bar{x}\right)^{3}}{\left[\frac{1}{N-1}\sum_{i=1}^{N}\left(x_{i}-\bar{x}\right)^{2}\right]^{3/2}}

Value

A vector of length one giving the sample skewness of x.

Examples

x<- rnorm(1000)
skewness(x)