Weighted Median
Compute a weighted median of a numeric vector.
weighted.median(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 |
na.rm |
a logical value indicating whether |
If w is missing then all elements of x are
given the same weight.
Missing values in w are not handled.
The weighted median is the median of the discrete distribution with
values given by x and probabilities given by w/sum(w).
numeric value giving the weighted median
## GPA from Siegel 1994 wt <- c(5, 5, 4, 1)/15 x <- c(3.7,3.3,3.5,2.8) xm <- weighted.median(x,wt)
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