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.
olized
:011
Stem
Normalized
Precision
.50 -
.26 Stem
Suffix `S' .22
½ Suffix
.18 -
.14 -
.10
.06
.02
Individual Individual
12 20 Requests 0
16 18 Requests
20 Requests better on Stem (62.5%) 18 Requests better on Stem (52.
12 Requests better on Suffix `5'
(37.5%) 16 Requests better on Suffix `5'
3 Requests equal on both ([OCRerr]7.
1 Request equal on both
ADI, Abstracts, 35 Requests
Graphs of the Magnitudes of the Differences in Individual Requests, Comparing
Stem and Suffix `s' Dictionaries, using Normalized Recall and Precision.
Fig. 7.