Table 3 

Precision and information gain of SAX* in the hashtag clustering task (one-year stream).

Golden Classifications:SAX* τ=0SAX* τ=2Baseline Clusters
TSURTWUBSTSURTWUBSTSURTWUBS
(|Cat.|=9)(|Cat.|=32)(|Cat.|=9)(|Cat.|=32)(|Cat.|=9)(|Cat.|=32)
Average NIG 0.967 0.778 0.98 0.82 0.77 0.6005 
Stand Dev (NIG) 0.042 0.1002 0.043 0.1066 0.25 0.27 
Average Precision 0.88 0.77 0.97 0.76 0.73 0.73 
Stand Dev (Precision) 0.127 0.128 0.085 0.26 0.27 0.29 
Average # of clusters 4.85 7.86 2.45 2.94 6.2 4.5 
 with |ci| > 1 in Wi 
Golden Classifications:SAX* τ=0SAX* τ=2Baseline Clusters
TSURTWUBSTSURTWUBSTSURTWUBS
(|Cat.|=9)(|Cat.|=32)(|Cat.|=9)(|Cat.|=32)(|Cat.|=9)(|Cat.|=32)
Average NIG 0.967 0.778 0.98 0.82 0.77 0.6005 
Stand Dev (NIG) 0.042 0.1002 0.043 0.1066 0.25 0.27 
Average Precision 0.88 0.77 0.97 0.76 0.73 0.73 
Stand Dev (Precision) 0.127 0.128 0.085 0.26 0.27 0.29 
Average # of clusters 4.85 7.86 2.45 2.94 6.2 4.5 
 with |ci| > 1 in Wi 
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