CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Methods for presentation of results
chapter
Cyril Cleverdon
Michael Keen
Cranfield
An investigation supported by a grant to Aslib by the National Science Foundation.
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
Coordination
Level
117
2/7
317
4/7
5]7
6/7
7/7
I0O
go
8o
7o
5o
J
J
0 50
hi
rr
[OCRerr] 4o
3o
3.27TP
-65 -
Recall
Ratio
94.4%
81. o%
58. '7%
31.3%
18. 7%
8.4%
3.2%
Precision
Ratio
O. 9%
2.4%
4.2%
9.9%
15.5%
23. 5%
48. r[OCRerr]o
2O
tO
I
\
0 I0 20 30 40 50 60 70 80 90 I00
°/o PP, ECISION
TABLE AND PLOT FOR RESULTS BY METHOD 2, PROPORTIONAL
COORDINATION LEVELS, FOR INDEX LANGUAGE I. 1. a.
(INDEX LANGUAGE i 6. a DOTTED LINE)