19 Oct 2004
CS 5244: Library Evaluation
27
Precision / Recall
ˇInterpolated precision
gives a non-increasing
curve
gives a non-increasing
curve
ˇBut doesn’t factor in
the size of the corpus
the size of the corpus
lPrevious example on a corpus of 25 docs = 40% precision
lOn a corpus of
2.5 M docs = also 40%
2.5 M docs = also 40%
1
0
1
0
Recall (%)
