awk function to compute median of an array?

Question

I want to have an awk function to compute the median of an array (may not be sorted).

The above is a similar post but it is not the same as this one because the input on the above post is a sorted stream.

Could anybody show me the function to compute the median of an array?

Who deleted the previous comments here. I am sick of the censorship at stackoverflow. Stackoverflow is self-serving and any comments revealing about the truth that it is self-serving frequently got deleted on stackoverflow website. — user1424739, Jun 24 '21 at 21:42

score 0 · Accepted Answer · answered Jun 24 '21 at 04:09

I got the following solution. I am not sure if it would fail in a corner case. If it does, please let me know.

function median(x,        n, d) {
    n = asort(x, d, "@val_num_asc")
    if(n == 0) return "NA"
    if(n%2) {
        return d[(n+1)/2]
    } else {
        return (d[n/2] + d[n/2+1])/2
    }
}

awk function to compute median of an array?

1 Answers1