IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Experiment in Automatic Thesaurus Construction
chapter
R. T. Dattola
D. M. Murray
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
viII-14
22
20 -
18 -
16 -
14 -
12 -
10
8 -
6-
4-
2-
0
Co
E
*
Cosine
.70 72.74.76 .78.80.82 Cutoff Value
I I I I I I I
Toni moto
.50.55.60.65 .70.75.80 Cutoff Value
Evaluation Statistics
(Averaged over three of the ADI Subcollections)
Fig. 4