IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Search Matching Functions
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.
III-[OCRerr]5
6 11
Relevant Non-Relevent
Docts. Docts.
Logical Average No. of
Cosine Matching Concepts 3.8 [OCRerr]e5
Average Sum of
Numeric Weights of Con-
Cosine cepts that Match 20[OCRerr] 167
in Document
Average Sum of
Products of Re-
quest + Document 2,328 2,1[OCRerr]7
Matching Weights
Average values for factors that go into the numerator o[OCRerr] the cosine corre-
lation comparing relevant and non-relevant documents for logical and numeric
vectors, from the results of Figures 27 and 28.
Figure 29.