weighted.meanvar {genefu} | R Documentation

## Function to compute the weighted mean and weighted variance of 'x'

### Description

This function allows for computing the weighted mean and weighted variance of a vector of continuous values.

### Usage

    weighted.meanvar(x, w, na.rm = FALSE)

### Arguments

`x` | an object containing the values whose weighted mean is to be computed.
`w` | a numerical vector of weights of the same length as `x` giving the weights to use for elements of `x`.
`na.rm` | `TRUE` if missing values should be removed, `FALSE` otherwise.

### Details

If `w` is missing then all elements of `x` are given the same weight, otherwise the weights coerced to numeric by `as.numeric`. On the contrary of weighted.mean the weights are NOT normalized to sum to one. If the sum of the weights is zero or infinite, NAs will be returned.

### Value

A numeric vector of two values that are the weighted mean and weighted variance respectively.

### Author(s)

Benjamin Haibe-Kains

### References

http://en.wikipedia.org/wiki/Weighted_variance#Weighted_sample_variance

### See Also

weighted.mean

### Examples

    set.seed(54321)
    weighted.meanvar(x=rnorm(100) + 10, w=runif(100))

[Package genefu version 2.11.2 Index]