Details
Description
I was playing with query expansion in CDs 4/5, using the TREC 6-8 topics. I used a standard trec_setup.sh and batchindex on a version of the corpus that has all the SGML files concatenated into a single file.
I did two runs:
bin/terrier batchretrieve -q -Dtrec.model=BM25 -c c:0.4 -Dtrec.topics=topics
and
bin/terrier batchretrieve -q -Dtrec.model=BM25 -c c:1.0 -Dtrec.topics=topics
Both runs (attached) have identical .settings files, but the change to the c parameter is not documented in either one.
I did two runs:
bin/terrier batchretrieve -q -Dtrec.model=BM25 -c c:0.4 -Dtrec.topics=topics
and
bin/terrier batchretrieve -q -Dtrec.model=BM25 -c c:1.0 -Dtrec.topics=topics
Both runs (attached) have identical .settings files, but the change to the c parameter is not documented in either one.