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user 69743
R is a free, open-source programming language and software environment for statistical computing, bioinformatics, and graphics.
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votes
Weighted mean with summarise_at dplyr
You can specify the weights directly within the weighted.mean() function, within the call to funs() like so:
data.frame(x=rnorm(100), y=rnorm(100), weight=runif(100)) %>%
summarise_at(vars(x,y) …
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