r - getting mean of variables based on names -

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i have vector hu <-rnorm(20) names names(hu) <- c(1:5,1:5,6:10,3:7) how group them can take means based on names?

try

 tapply(hu, names(hu), fun=mean)

if need in order 1:10, convert names(hu) 'character' 'numeric'

 tapply(hu, as.numeric(names(hu)), fun=mean)

or

  unique(ave(hu, names(hu)))

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