vtable: weighted.sd – R documentation

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weighted.sd

Weighted standard deviation

Description

This is a basic weighted standard deviation function, mainly for internal use with sumtable. For a more fully-fledged weighted SD function, see Hmisc::wtd.var, although it uses a slightly differend degree-of-freedom correction.

Usage

weighted.sd(x, w, na.rm = TRUE)

Arguments

`x`	A numeric vector.
`w`	A vector of weights. Negative weights are not allowed.
`na.rm`	Set to `TRUE` to remove indices with missing values in `x` or `w`.

Examples

x <- c(1, 1, 2, 3, 4, 4, 4)
w <- c(4, 1, 3, 7, 0, 2, 5)
weighted.sd(x, w)

vtable

Variable Table for Variable Documentation

v1.3.1

MIT + file LICENSE

Authors

Nick Huntington-Klein [aut, cre]

Initial release