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| 152 |
for which average precision values are calculated by averaging over all queries the individual precision values corresponding to the standard recall values
...Interpolation Many interpolation techniques have been suggested in the literature
...IMG SRC Fig
...Figure 7
...It is an experimental fact that average precision recall graphs are monotonically decreasing
...Let R [[lambda]],P [[lambda]]be the set of precision recall values obtained by varying some parameter [[lambda]]... |
| 153 |
if [[theta]]corresponds to a value of [[lambda]]at which an increase in recall is produced
...G s R [[theta]]s,P [[theta]]s the set of observed points for a request
...Ps R sup P:R >R s
...where R is a standard recall value
...The set of observed points is such that the interpolated function is monotonically decreasing
...In Figure 7
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