An Efficient Recommendation Algorithm Based on Heterogeneous Information Network

Table 2

Statistics of data sets.

Data set	Relationship (A-B)	A	Number of B’s	Number of (A-B)	Average degrees of A/B
Douban Movie	User-movie	13367	12677	1068278	79.9/84.3
	User-user	21192	2294	4085	1.7/1.8
	User-group	2440	2753	570047	42.7/207.1
	Movie-director	13337	2449	11276	1.1/4.6
Yelp	Movie-actor	10179	6311	33587	2.9/5.3
	Movie-type	11718	38	27668	2.2/728.1
	User-business	12678	14284	198397	12.2/13.9
	User-user	16239	10580	158590	15.0/15.0
	User-complement	10580	11	76875	5.3/6988
	Business-city	14411	47	14267	1.0/303.6
	Business-category	14267	511	40009	2.8/78.3
	User-book	14180	22347	792026	60.8/35.4
	User-user	13024	12748	169150	13.3/13.3
	User-group	12748	2936	1189271	91.3/405.1
Douban Book	Book-author	13024	10805	21907	1.0/78.3
	Book-publisher	21907	1815	21773	1.0/11.9
	Book-year	21773	64	21192	1.0/331.1