IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Search Matching Functions
chapter
E. M. Keen
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
Overlap, Logicol, Stem
Cosine, Logical, Stem
Precision
1.0
0.8
06
0.4
0.2
I I I I I [OCRerr]Recall
0 0.2 0.4 0.6 0.8 1.0
ADI, Abstracts, 35 Requests
Overlap, Logical, Thesauri
Cosine1 Logical, Thesourti
Precision
1.0
0.8
0.6
0.4
0.2
I I I I [OCRerr] Recc
1.0
0 0.2 0.4 0.6 0.8
ADI, Abstracts, 35 Requests
Perfonriance Curves Comparing Cosine and Overlap Correlation Coefficients
Using [OCRerr]o Dictionaries, ADI Abstracts Collection.
Fig. 7.