Nothing
l1score <-
function(x){
stopifnot(is.vector(x) & is.numeric(x))
if(sum(is.na(x)) == length(x)){return(rep(1, length(x)))}
stopifnot(is.numeric(x))
x <- abs(x)
1 - x / max(c(1, x), na.rm = TRUE)
}
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