Text Classification Using Novel Term Weighting Scheme-Based Improved TF-IDF for Internet Media Reports

Table 18

Performance on Reuters-21758 using the NB classifier.

NB	Precision					Recall					F1 score
	TF-IDF (%)	TF-IADF (%)	TF-IADFnorm (%)	TF-IADF^+ (%)	TF-IADF^+norm (%)	TF-IDF (%)	TF-IADF (%)	TF (%)	TF-IADF^+ (%)	TF-IADF^+norm (%)	TF-IDF (%)	TF-IADF (%)	TF-IADFnorm (%)	TF-IADF^+ (%)	TF-IADF^+norm (%)
Acq	91.83	91.74	91.60	91.12	91.34	92.10	92.53	92.39	91.38	90.95	91.97	92.13	91.99	91.25	91.15
Crude	85.71	88.07	88.07	86.49	87.16	79.34	79.34	79.34	79.34	78.51	82.40	83.48	83.48	82.76	82.61
Earn	92.65	92.68	92.67	92.14	91.84	95.48	95.85	95.75	95.20	95.57	94.04	94.24	94.19	93.64	93.67
Grain	71.43	71.43	71.43	71.43	71.43	50.00	50.00	50.00	50.00	50.00	58.82	58.82	58.82	58.82	58.82
Interest	78.26	84.44	82.61	78.26	79.55	48.00	50.67	50.67	48.00	46.67	59.50	63.33	62.81	59.50	58.82
Moneyfx	76.00	77.22	77.22	77.03	77.03	65.52	70.12	70.12	65.52	65.52	70.37	73.49	73.49	70.81	70.81
Ship	85.19	92.00	92.00	88.46	85.19	63.89	63.89	63.89	63.89	63.89	73.02	75.41	75.41	74.19	73.02
Trade	70.59	74.34	74.34	69.75	69.75	91.30	91.30	91.30	90.22	90.22	79.62	81.95	81.95	78.67	78.67