#command cdx uniq -k two --agg-pre three_sum,three,sum --agg-post one_mean,one,mean
#stdin
CDX one two three
1.0 bbb 10
2.0 bbb 20
3.0 bbb 30
4.0 ccc 40
5.0 ccc 50
6.0 ccc 60
#stdout
CDX three_sum one two three one_mean
60 1.0 bbb 10 2
150 4.0 ccc 40 5