Table 4 Term Weights in the SMART System.
From: Data-poor categorization and passage retrieval for Gene Ontology Annotation in Swiss-Prot
Term Frequency | |
|---|---|
First Letter | f(tf) |
n (natural) | tf |
l (logarithmic) | 1 + log(tf) |
a (augmented) | α + β × (tf/max(tf)) |
Inverse Document Frequency | |
Second Letter | f(1/df) |
n(no) | 1 |
t(full) | log(N /df) |
Normalization | |
Third Letter | f(length) |
n(no) | 1 |
c(cosine) |
|
