Table 3. The clustering accuracy of different models on the correct number of topics.

The best results are highlighted in bold (The higher the better).

Datasets	Topic models	Metrics
		NMI	ARI	ACC
BBCsport	LDA	0.709	0.662	0.851
	NMF	0.818	0.856	0.872
	K-Means	0.894	0.896	0.963
BBCNews	LDA	0.727	0.701	0.862
	NMF	0.812	0.842	0.932
	K-Means	0.751	0.726	0.868
Reuters	LDA	0.432	0.443	0.669
	NMF	0.550	0.597	0.776
	K-Means	0.632	0.671	0.832
AGNews	GSDMM	0.585	0.622	0.833
	SeaNMF	0.563	0.600	0.822
Snippets-1	GSDMM	0.565	0.592	0.830
	SeaNMF	0.580	0.634	0.850
Snippets-2	GSDMM	0.764	0.823	0.919
	SeaNMF	0.787	0.850	0.939