The vector of weights w is relative since the formula is:
Arguments
- x
A numeric vector.
- w
A vector of numeric weights of the same length as x.
Value
The weighted mean as a scalar value
Details
$$ y = \frac{1}{\sum w_i} \sum w_i x_i $$
If x contains NAs, these x values and the corresponding w values are removed before applying the
formula above.
Examples
x <- c(1:10)
w <- c(10:1)
a_amean(x,w)
#> [1] 4