timeDate (version 3043.102)

skewness: Skewness

Description

Functions to compute skewness.

Usage

skewness(x, ...)
# S3 method for default
skewness(x, na.rm = FALSE, method = c("moment", "fisher"), ...)
# S3 method for data.frame
skewness(x, ...)
# S3 method for POSIXct
skewness(x, ...)
# S3 method for POSIXlt
skewness(x, ...)

Value

skewness

returns the value of the statistics, a numeric value. An attribute which reports the used method is added.

Arguments

na.rm

a logical. Should missing values be removed?

method

a character string which specifies the method of computation. These are either "moment" or "fisher" The "moment" method is based on the definitions of skewnessfor distributions; these forms should be used when resampling (bootstrap or jackknife). The "fisher" method correspond to the usual "unbiased" definition of sample variance, although in the case of skewness exact unbiasedness is not possible.

x

a numeric vector or object.

...

arguments to be passed.

See Also

link{kurtosis}.

Examples

## mean -
## var -
   # Mean, Variance:
   r = rnorm(100)
   mean(r)
   var(r)
   
## skewness -
   skewness(r)