weighted.stats: Weighted Mean, Variance and Standard Deviation

In LimaRAF/TreeCo: An R Package to Manage TreeCo Database

Weighted Mean, Variance and Standard Deviation

Description

Calculates the weighted mean and the variance or standard deviation for a given weighted mean.

Usage

weighted.stats(x, w, na.rm = FALSE, stats = "mean")

Arguments

x	numerical. A vector of values to compute the weighted statistics.
w	numerical. A vector of weights with the same length as x.
na.rm	logical. Should NA values be removed? Default to FALSE.
stats	character. Which weighted statistic should be returned: "mean", "var" or "sd"?

Details

Weigths should vary between 0 and 1. If they don't, they are normalized to sum one. Weights equal to 0 means that the corresponding values in x will be omitted from the from the calculation.

Author(s)

Renato A. F. de Lima

Examples

x <- c(1,3,4,8)
w <- c(0.2,0.5,0.7,0.9)
mean(x); weighted.stats(x, w)
sd(x); weighted.stats(x, w, stats = "sd")

LimaRAF/TreeCo documentation built on Sept. 25, 2024, 12:41 p.m.