ISR11
Scientific Report No. ISR-11 Information Storage and Retrieval
Design Criteria for Automatic Information Systems
chapter
M. E. Lesk
G. Salton
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
O[OCRerr]O Logical Stems (Null Logvec)
X[OCRerr]X Weighted Stems [OCRerr]Full Null)
PRECISION
0
x
o\X[OCRerr]x[OCRerr]x
0.8
O\ \[OCRerr]
0.6
O[OCRerr]C
x
\o[OCRerr]o4x[OCRerr][OCRerr]\X
0.4
0.2
0
I g S I RECALL
0 0.2 0.4 0.6 0.8 1.0
Effectiveness of Weighted Word Stems
(IRE-2 collection 17 requests)
Fig. 6