misty (version 0.4.6)

skewness: Skewness

Description

This function computes the skewness.

Usage

skewness(x, as.na = NULL, check = TRUE)

Value

Returns the estimated skewness of x.

Arguments

x

a numeric vector.

as.na

a numeric vector indicating user-defined missing values, i.e. these values are converted to NA before conducting the analysis.

check

logical: if TRUE, argument specification is checked.

Author

Takuya Yanagida

Details

The same method for estimating skewness is used in SAS and SPSS. Missing values (NA) are stripped before the computation. Note that at least 3 observations are needed to compute skewness.

References

Rasch, D., Kubinger, K. D., & Yanagida, T. (2011). Statistics in psychology - Using R and SPSS. New York: John Wiley & Sons.

See Also

kurtosis

Examples

# Set seed of the random number generation
set.seed(123)
# Generate random numbers according to N(0, 1)
x <- rnorm(100)

# Compute skewness
skewness(x)