sort(x, partial = NULL, na.last = NA)
partial is non NULL, it is taken to contain indexes
of elements of x which are to be placed in their correct
positions by partial sorting. After the sort, the values specified in
partial are in their correct position in the sorted array. Any
values smaller than these values are guaranteed to have a smaller
index in the sorted array and any values which are greater are
guaranteed to have a bigger index in the sorted array.
If na.last is NA, sort removes missing values.
If na.last is TRUE, missing values are put last, if
FALSE, missing values are put first.
order, rank.data(swiss) x <- swiss$Education[1:25] x; sort(x); sort(x, partial = c(10,15)) median # shows you another example for `partial'