IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Suffix Dictionaries
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.
Stem
Suffix `S'
3lized
oil
Stem
Suffix `S'
Norma I ized
Precision
.20 -
.16 -
.12
.08
.04
Individual
24 Requests
(70.6%)
10 Requests better on Suffix `5' (29.4%)
I0
24 Requests better on Stem
0
IRE-3, 3[OCRerr] Requests
_ II
9 25R
25 Requests better on Stem (73.5
9 Requests better on Suffix `5' (26.5
Graphs of the Magnitudes of the Differences in Individual Requests Comparing Stem and
Suffix `5' Dictionaries, using Normalized Recall and Precision
Fig. 5.