Application of an Improved CHI Feature Selection Algorithm

Table 5

Comparison of classification results between CHI and Var-CV-CHI on the unbalanced Chinese corpus (KNN).

Category	CHI			Var-CV-CHI
	Precision	Recall	F1-score	Precision	Recall	F1-score
Culture	0.97	0.90	0.93	0.93	0.92	0.92
Education	0.93	0.82	0.87	0.93	0.87	0.90
Entertainment	0.92	0.91	0.91	0.91	0.93	0.92
Event	0.79	0.80	0.80	0.79	0.80	0.80
Finance	0.86	0.84	0.85	0.88	0.88	0.88
Game	0.97	0.97	0.97	0.97	0.98	0.97
Health	0.51	0.92	0.66	1.00	0.68	0.81
Occultism	0.64	1.00	0.78	0.47	1.00	0.64
Sport	0.97	0.86	0.91	0.96	0.84	0.90
Technology	0.93	0.79	0.86	0.94	0.87	0.91
Macro-avg-P	0.85			0.88
Macro-avg-R	0.88			0.88
Macro-avg-F1	0.85			0.87