ISR10
Scientific Report No. ISR-10 Information Storage and Retrieval
The Query-Document Matching Function
chapter
Joseph John Rocchio
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
Category Corr. No. of Cumulative Overlap Overlap Category
[OCRerr]ormal.
Number with Elements No. 0£ Corr. Corr. Recall Recall
Query Elements 1st 15 1st 30
5 - .66 29 29 .6o .62 .86 .86
20[OCRerr] 2 .46 23 49$ .80 .77 1.00 1.00
7 .34 3% 84 .87 .83 1.00 1.00
Categories 4 .32 22 105 1.00 .97 1.00 1.00
17 .28 27 124 1.00 1.00 1.00 1.00
21 .70 21 21 .67 .76 .71 .71
2 .56 15 30 .87 70 .71 .86
30
Categories 5 .53 20 48 1.00 .90 1.00 1.00
11 .32 21 69 1.00 `93 3 1.00 1.00
22 .28 25 90 1.00 .97 1.00 .1.00
8 .73 14 14 .71 .86 .43 .71
40 5 .58 16 30 .87 .70 .71 .86
Categories 34 .43 9 39 .93 .80 .86 1.00
2 .43 11 47 .93 .87 .86 1.00
12 .35 18 64 1.00 .90 .86 1.00
( Category numbers[OCRerr] have no relatio[OCRerr] from one
classification to another.
Evaluation of [OCRerr]Pwo Level Searching for Test Query `1Core Memory"
Figure 4.12