IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Evaluation Parameters
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.
11-1*7
Relevance Relevance
Rank Grdde Products Rank Grade Products
1 1+ 14 1 1 1
2 3 6 2 2 14
3 2 6
3 3 9
14 1 14 14 14 16
Sum of Products 20 Sum of Products 30
[OCRerr]eighted Normed. Recall 1.000 Weighted Normed. Recall .9872
(a) Perfect Ranks and Perfect (b) Perfect Ranks and Worst
Relevance Grade Order Relevance Grade Order
Relev rce Relevance
Rank Grade Products Rank Grade Products
1 14 14 3 3 9
3 3 9 13 2 26
14 2 8 19 14 76
9 1 9 141 2 82
Sum of Products 30 Sum of Products 193
Weighted Normed. Recall .9872 Weighted Normed. Recall .78141*
(c) Less than Perfect Ranks
and Perfect Relevance
Grade Order
(d) Actual Performance of
Cran-l Request [OCRerr]67,
Suffix 15t Dictionary
Examples of Use of Weighted Normalized Recall.
Fig. 27.