Terrier uses jtreceval to provide the evaluation of standard retrieval runs. jtreceval contains trec_eval compiled to run under various standard platforms (e.g. Windows/Linux/Mac x86). For unsupported platforms, Terrier also includes a legacy Java evaluation package for evaluating results of TREC adhoc and named-page finding tasks.
Before running an evaluation, we need to specify the relevance assessments file in the property trec.qrels. To evaluate all .res result files in folder var/results, we can type the following:
bin/terrier batchevaluate
The batchevaluate command evaluates each .res file in folder var/results using trec_eval. We can evaluate for a particular result file by giving the filename in the command line:
bin/terrier batchevaluate -e InL2c1.0_0.res
or
bin/trec_terrier.sh -e ./var/results/InL2c1.0_0.res
The above command evaluates only ./var/results/InL2c1.0_0.res. For a result file named x.res, the evaluation result is saved in file x.eval, which contains the content as shown in the following example:
runid all InL2c1.0
num_q all 93
num_ret all 91930
num_rel all 2083
num_rel_ret all 1941
map all 0.2948
gm_map all 0.1980
Rprec all 0.2998
bpref all 0.9359
recip_rank all 0.7134
iprec_at_recall_0.00 all 0.7376
iprec_at_recall_0.10 all 0.6431
iprec_at_recall_0.20 all 0.5232
iprec_at_recall_0.30 all 0.4079
iprec_at_recall_0.40 all 0.3424
iprec_at_recall_0.50 all 0.2710
iprec_at_recall_0.60 all 0.2028
iprec_at_recall_0.70 all 0.1555
iprec_at_recall_0.80 all 0.1075
iprec_at_recall_0.90 all 0.0607
iprec_at_recall_1.00 all 0.0245
P_5 all 0.4667
P_10 all 0.3677
P_15 all 0.3097
P_20 all 0.2747
P_30 all 0.2394
P_100 all 0.1285
P_200 all 0.0789
P_500 all 0.0382
P_1000 all 0.0209
The above displayed evaluation measures are averaged over a batch of queries. We can obtain per-query results by using option -p in the command line:
bin/terrier batchevaluate -e PL2c1.0_0.res -p
The resulting output saved in the corresponding .eval file will contain further results, with the middle column indicating the query id.
Terrier ships with treceval, which contains trec_eval binaries that work on Linux x86/x8664, Mac OS X x8664 and Windows x86. You can therefore use easily trec_eval directly from the command line, by invoking the trec_eval.sh script:
bin/terrier trec_eval /path/to/qrels var/results/PL2c1.0_0.res
Webpage: http://terrier.org
Contact: School of Computing Science
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