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.
Logicol, Cosine, Thesaurus - 3
O[OCRerr]O Logical, Cosine, Stem 0
Numeric, Cosine, Stem Thesaurus - 3
x X[OCRerr]X Numeric, Cosine,
ecision Precision
.0 1.0
8 0.8
6 0.6
.4
0.4
x\0
- x[OCRerr]0[OCRerr]
[OCRerr]o[OCRerr]x
.2 O[OCRerr]O 0.2
I I I I I [OCRerr] Recoil
0.8 1.0
) 0.2 0.4 0.6
CRAN-1, [OCRerr]2 Requests
I I I [OCRerr] Recoil
1.0
0 0.2 0.4 0.6 0.8
CR[OCRerr]-l, 42 Requests
Performance curves comparing numeric and logical vectors
using two dictionaries, Cran-l Collection.
Fig. 19.