ISR10 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. 4-3~ 40 - Co Co a 30[OCRerr] Co Co Co 0 CH 20. CH 0 +) C) -H Co Co -H 0 Co [OCRerr] 10 - C) 0 0 Average [OCRerr]ocument- classification vector II 4< 40 category correlation 30 category 20 category Ii III .4 20 categories - .523 30 categories - .564 40 categories - 596 .5 Cbrrelation Cumulative Frequency Distribution of the Cutoff Correlation for Three Classifications Figure 4.10