A tool for performing popular fusion techniques on TREC run files.

The following fusion methods are supported:

• Borda count
• CombANZ
• CombMAX
• CombMED
• CombMIN
• CombMNZ
• CombSUM
• Inverse square rank
• Logarithmic inverse square rank
• Rank-biased centroids
• Reciprocal rank fusion

Fuse three runs using CombSUM with scaled normalization to depth 100:

polyfuse combsum -d 100 -n minmax a.run b.run c.run > combsum.run

To see all fusion commands and options run polyfuse -h.

To try all fusion methods run tools/sweep_polyfuse.py a.run b.run c.run and the output will be saved in fusion_output/.