Gamma-Poisson Distribution Model for Text Categorization

Table 3

Statistical summary of the distribution of nonzero components for the four datasets used here. IQR and SD mean inter quartile range and standard deviation, respectively.

Dataset	Δ (%)	Median	Mean	IQR	SD
20 Newsgroups	0.05	0.00054	0.00077	0.0005	0.0011
Reuters-21578	1.97	0.00123	0.00167	0.0012	0.0015
Industry Sector	9.04	0.00135	0.00206	0.0019	0.0026
TechTC-100	3.70	0.00276	0.00352	0.0027	0.0037