Table 3.

Results of Amazon_6 in four classes for 5705 texts by KNN.

Model	Accuracy and F1-Macro of Different Dimensions
	200		300		500		800
	Acc	F1	Acc	F1	Acc	F1	Acc	F1
FW	0.9063	0.8818	0.8964	0.8721	0.9051	0.8817	0.9018	0.8786
P2	0.8676	0.8504	0.8678	0.8509	0.8676	0.8509	0.8826	0.851
PW	0.9438	0.9325	0.9442	0.9336	0.9437	0.9327	0.9449	0.9345
FP2	0.9167	0.8976	0.9078	0.8823	0.9167	0.8972	0.9125	0.8918
FPW	0.9427	0.931	0.9427	0.9312	0.9435	0.9319	0.9433	0.9326
FPC	0.9407	0.9283	0.9411	0.0295	0.9395	0.9276	0.9417	0.9304
Accuracy and F1-Macro of Baselines
Model	Acc				F1
TF–IDF	0.8292				0.8064
LDA	0.9253				0.9103
Word2Vec	0.9404				0.9243