IRS13 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. 11-42 P P P Cs -[OCRerr] FS FS Cs C[OCRerr]5S2[OCRerr]Th;;;[OCRerr] R R R a) Cluster Ranks - none b) Cluster Ranks - 3, 7 c) Cluster Ranks - 1, 3 Full Search ----, Ranks 2, 4, 7, 10, 14. Cluster Searches, result --- , extrapolation The Extrapolation Technique Used to Construct Average Precision Recall Curves for Cluster Searches Fig. 25