weighted.mean(x, w, na.rm=FALSE)
x
| a numeric vector containing the values whose mean is to be computed. |
w
|
a vector of weights the same length as x giving
the weights to use for each element of x.
|
na.rm
|
a logical value indicating whether NA
values in x should be stripped before the computation proceeds.
|
w is missing then all elements of x are
given the same weight.
Missing values in w are not handled.
mean## GPA from Siegel 1994 wt<- c(5/15,5/15,4/15,1/15) x <- c(3.7,3.3,3.5,2.8) xm <- weighted.mean(x,wt)