IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Correlation Measures
chapter
K. Reitsma
J. Sagalyn
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
~REClSl0N
.65
.60 -
.55 -
.50 -
45 -
.40 -
35 -
30 -
25 -
.20 -
(
Results 1 0-0
with ADI
Collection -
AA
Results with
Cranfield
Collection
PRN
Cosine
Stiles
Overlap
Stiles
Overlap
Cosine
¶Y½ PRN
I I I I I I I I I I I I I I I I I[OCRerr]i [OCRerr]
0.10 0.20 0.50 OAO 0.50 0.60 0.70 0.80 0.90 1.00
C[OCRerr]parison 0£ the results obtained with the four best correlation
functions using the ADJ and CRANFIELD collections.
Fig. 3