Next: 15.1.3 The probability ranking
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- precision($BE,9gN((B), recall($B:F8=N((B)
- query $B$KBP$7$F(B,$B$9$Y$F$N(B document $B$r@52r$H=PNO$9$k(B system
recall 100%
- query $B$KBP$7$F(B $B@5$7$$(B document $B$?$@(B1$B$D$rEz$($k(B system
precison 100%
$B0lHLE*$K(B trade off $B$N4X78(B
- CUTOFF
- N $B0L(B $B$N(B precison
- N $B$r(B cutoff$B$H$$$&(B (5,10,20,100)
($BNc(B Table 15.2)
- Uninterpolated average precision
($BNc(B Figure 15.2)
ranking 3 $B$N(B Uninterpolated average precison $B$O(B?
- Interpolated average precison (11-point)
- $B0lHLE*$JI>2A4p=`(B, recall $B$r9MN8(B
- recall 0% 10% 20%
100% (11 points) $B$K$*$1$k(B
precision $B$NJ?6QCM(B
- recall $B$r(B
$B$H$$$&CM$K8GDj$7$F(B $B$=$N;~$N(B precison
$B$r5a$a$k$3$H$O0lHLE*$K:$Fq(B
- $B@52r$,(B 2$B$D$7$+L5$$>l9g$O(B, recall $B$O(B 0,50,100% $B$N(B3
$BDL$j$7$+$J$$(B
$B@52r$,==J,$J8D?t$"$l$P2DG=(B
- precison $B$,C1D48:>/$7$J$$>l9g(B(Figure 15.2$B>e(B),
$B$3$l$^$G$N:GBgCM$r(B precison $B$H$9$k(B
- interpolate (Figure 15.2$B2<(B)
- precision-recall curves
- $B0lHLE*$K1&2<$,$j(B
- trade off $B$N4X78(B
- F measures
- $B$3$l$i$NCM$O(B, $B8!:w(Bsystem $B$N@-G=I>2A$KMQ$$$i$l$k(B,
$B$7$+$7(B,$B6vA3(B, system $B$K0MB8$7$?(B query $BEy$,860x$G(B,
$B@dBPE*$JI>2A4p=`$H$J$j$&$k$H$O8B$i$J$$(B
t$B8!Dj$J$I$rMQ$$$k(B
- $BM>CL(B
TREC $B$N(B tool $B$K$3$l$i$NI>2ACM$r7W;;$9$k(B program $B$,$"$j$^$9(B
1999-08-03