weighted.sd {descriptio}

Weighted standard deviation

Description

Computes the weighted standard deviation of a distribution.

Usage

weighted.sd(x, weights = NULL, na.rm = FALSE)

Arguments

x

numeric vector

weights

numeric vector of weights. If NULL (default), uniform weights (i.e. all equal to 1) are used.

na.rm

logical, indicating whether NA values should be silently removed before the computation proceeds. Default is FALSE.

Value

a length-one numeric vector

Author(s)

Nicolas Robette

See Also

weighted.cor

Examples

data(Movies)
weighted.sd(Movies$Critics, weights = rep(c(.8,1.2), 500))