Effect of Collaborative Recommender System Parameters: Common Set Cardinality and the Similarity Measure

Table 6

PCP and coverage of the examined RS with different common set sizes.

		PCP					Coverage					MAE
		CS1	CS2	CS3	CS4	CS5	CS1	CS2	CS3	CS4	CS5	CS1	CS2	CS3	CS4	CS5
CBRS	10	10.15	23.22	27.83	30.18	32.09	32.05	69.62	80.08	84.95	87.99	7.02	1.66	1.09	0.9	0.62
	30	31.7	34.38	35.34	35.71	36.43	89.02	94.46	95.81	95.78	96.61	1.23	0.97	0.77	0.71	0.49
	50	35.53	36.11	36.24	36.25	36.74	96.49	97.19	97.25	96.67	97.12	1	0.93	0.75	0.7	0.48
CVRS	10	6.74	20.24	27.44	30.5	31.98	22.98	60.33	78.13	85.05	87.39	9.02	2.15	1.08	0.85	0.63
	30	26.02	33.92	35.23	35.59	36.05	75.77	93.52	95.77	96.19	96.46	1.84	1.05	0.74	0.68	0.52
	50	34.27	35.49	36.13	35.98	36.6	94.46	97.04	97.77	97.48	97.44	1.08	1	0.71	0.66	0.5
DWRS	10	18	26.53	29.94	31.65	32.95	51.59	74.52	82.79	86.66	88.74	3.62	1.44	0.99	0.84	0.6
	30	34.2	35.45	36.23	36.09	36.54	91.71	94.41	95.49	95.79	96.34	1.12	0.95	0.76	0.69	0.5
	50	36.48	36.53	36.83	36.49	37.15	96.17	96.88	97.1	97.1	97.39	1.01	0.91	0.74	0.68	0.49
MDRS	10	23.08	29.22	31.46	31.78	32.95	63.93	79.67	85.41	87.43	89.16	2.41	1.3	0.95	0.83	0.6
	30	34.84	35.65	36.13	36.01	36.68	93.04	94.74	95.6	95.83	96.27	1.09	0.94	0.76	0.69	0.5
	50	36.47	36.48	36.75	36.64	37.45	96.37	96.81	97.06	97.09	97.39	1.01	0.91	0.74	0.68	0.49