HUMAnN is a pipeline for efficiently and accuretly profiling the presence/absence and abundance of microbial pathways in a community from metagenomic or metatranscriptomic sequencing data.
Read more about the tool: http://huttenhower.sph.harvard.edu/humann
This tool reduces a joined HUMAnN table. It selects for each row which value to keep given a function (max, sum, mean or min).