Table 2. The performance comparison based on Last.fm dataset.

Training	Metrics	HeatS	PMF (baseline)	HP	SR	EISR-JC	EISR-CN	EISR-PA	EISR-RAI
60%	MAE	0.4474	0.4387	0.4386	0.4321	0.4279	0.4259	0.4251	0.4223
60%	RMSE	0.5601	0.5482	0.5480	0.5394	0.5375	0.5355	0.5350	0.5342
80%	MAE	0.4310	0.4253	0.4251	0.4214	0.4108	0.4068	0.4065	0.4048
80%	RMSE	0.5491	0.5339	0.5337	0.5300	0.5221	0.5210	0.5209	0.5201
90%	MAE	0.4229	0.4189	0.4188	0.4137	0.4025	0.4017	0.4015	0.4001
90%	RMSE	0.5370	0.5230	0.5227	0.5212	0.5140	0.5120	0.5120	0.5110