- Filter out users with less than K interactions
- Filter out items with no interactions
K-core Setting
- Filter out users with less than K interactions
- Filter out items with less than K interactions
- Repeat until there is no further change in # users and items
Statistics
Definitions
- User Avg. Ratings: (# Ratings) / (# Users)
- Sparsity: 1 - {(# Ratings) / (# Users * # Items)}
- Shape: # Users / # Items
- Gini User/Item: Gini-index of user/item popularity. Ratings are more inequally distributed as the index is close to 1.
- Item Concen.: (Item Concentration) Ratio of the ratings that top 5% items hold.
Raw data (data without preprocessing)
Dataset
# Users
# Items
# Ratings
User Avg. Ratings
Sparsity
Shape
Gini User
Gini Item
Item Concen.
ML-1M
6,040
3,706
1,000,209
165.60
0.9553
1.6298
0.5286
0.6336
0.2828
ML-10M
69,878
10,677
10,000,054
143.11
0.9866
6.5447
0.5707
0.8052
0.5165
ML-20M
138,493
26,744
20,000,263
144.41
0.9946
5.1785
0.5807
0.9029
0.7141
ML-25M
162,541
59,047
25,000,095
153.81
0.9974
2.7527
0.5895
0.9419
0.8445
Amazon Music
16,566
11,797
145,292
8.77
0.9993
1.4043
0.3756
0.4315
0.2476
Amazon CD
112,395
73,713
1,402,148
12.48
0.9998
1.5248
0.4656
0.5432
0.3353
Amazon C&A
157,212
48,186
1,120,771
7.13
0.9999
3.2626
0.2091
0.5875
0.3787
Amazon Games
55,223
17,408
473,427
8.57
0.9995
3.1723
0.3230
0.5849
0.3484
Epinions
40,163
139,738
664,823
16.55
0.9999
0.2874
0.6763
0.6936
0.5339
Ciao
6,762
16,610
146,997
21.74
0.9987
0.4071
0.5518
0.5309
0.3128
Yelp 2015
25,677
25,815
696,865
27.14
0.9989
0.9947
0.4509
0.6037
0.3512
Yelp 2018
45,919
45,538
1,183,609
25.78
0.9994
1.0084
0.4268
0.5810
0.3458
Gowalla
107,092
1,280,969
3,981,334
37.18
0.9999
0.0836
0.6627
0.5390
0.3628
CiteULike
5,551
16,980
204,986
36.93
0.9978
0.3269
0.4706
0.3696
0.2098
Pinterest
55,187
9,916
1,463,580
26.52
0.9973
5.5655
0.1401
0.4511
0.1899
10-minimum User Interactions
Dataset
# Users
# Items
# Ratings
User Avg. Ratings
Sparsity
Shape
Gini User
Gini Item
Item Concen.
ML-1M
6,040
3,706
1,000,209
165.60
0.9553
1.6298
0.5286
0.6336
0.2828
ML-10M
69,878
10,677
10,000,054
143.11
0.9866
6.5447
0.5707
0.8052
0.5165
ML-20M
138,493
26,744
20,000,263
144.41
0.9946
5.1785
0.5807
0.9029
0.7141
ML-25M
162,541
59,047
25,000,095
153.81
0.9974
2.7527
0.5895
0.9419
0.8445
Amazon Music
3,951
11,483
75,044
18.99
0.9983
0.3441
0.3067
0.4505
0.2405
Amazon CD
36,487
73,493
933,651
25.59
0.9997
0.4965
0.4448
0.5455
0.3296
Amazon C&A
21,361
44,416
301,976
14.14
0.9997
0.4809
0.1915
0.5807
0.3479
Amazon Games
11,986
17,100
215,645
17.99
0.9989
0.7009
0.2994
0.5833
0.3319
Epinions
15,786
132,964
580,752
36.79
0.9997
0.1187
0.4816
0.6768
0.5197
Ciao
3,829
15,768
129,798
33.90
0.9979
0.2428
0.4516
0.5267
0.3119
Yelp 2015
24,930
25,799
690,381
27.69
0.9989
0.9663
0.4482
0.6038
0.3510
Yelp 2018
45,842
45,538
1,182,917
25.80
0.9994
1.0067
0.4267
0.5811
0.3458
Gowalla
68,709
1,247,158
3,831,386
55.76
0.9999
0.0551
0.5458
0.5365
0.3612
CiteULike
5,551
16,980
204,986
36.93
0.9978
0.3269
0.4706
0.3696
0.2098
Pinterest
55,187
9,916
1,463,580
26.52
0.9973
5.5655
0.1401
0.4511
0.1899
20-minimum User Interactions
Dataset
# Users
# Items
# Ratings
User Avg. Ratings
Sparsity
Shape
Gini User
Gini Item
Item Concen.
ML-1M
6,040
3,706
1,000,209
165.60
0.9553
1.6298
0.5286
0.6336
0.2828
ML-10M
69,878
10,677
10,000,054
143.11
0.9866
6.5447
0.5707
0.8052
0.5165
ML-20M
138,493
26,744
20,000,263
144.41
0.9946
5.1785
0.5807
0.9029
0.7141
ML-25M
162,541
59,047
25,000,095
153.81
0.9974
2.7527
0.5895
0.9419
0.8445
Amazon Music
1,074
10,116
37,526
34.94
0.9965
0.1062
0.2673
0.4466
0.2298
Amazon CD
12,284
71,838
616,845
50.22
0.9993
0.1710
0.4262
0.5472
0.3234
Amazon C&A
2,302
25,285
66,772
29.01
0.9989
0.0910
0.1976
0.4593
0.2585
Amazon Games
2,734
15,189
97,227
35.56
0.9977
0.1800
0.2826
0.5611
0.3069
Epinions
8,693
123,330
482,849
55.54
0.9996
0.0705
0.4192
0.6525
0.4983
Ciao
2,075
14,887
105,827
51.00
0.9966
0.1394
0.3814
0.5224
0.3083
Yelp 2015
9,788
25,373
489,820
50.04
0.9980
0.3858
0.3972
0.5959
0.3346
Yelp 2018
17,137
45,447
806,078
47.04
0.9990
0.3771
0.3768
0.5853
0.3381
Gowalla
47,752
1,183,848
3,530,010
73.92
0.9999
0.0403
0.4946
0.5289
0.3558
CiteULike
3,097
16,792
171,391
55.34
0.9967
0.1844
0.3939
0.3873
0.2139
Pinterest
52,190
9,909
1,408,089
26.98
0.9973
5.2669
0.1359
0.4578
0.1923
10-core Settings
Dataset
# Users
# Items
# Ratings
User Avg. Ratings
Sparsity
Shape
Gini User
Gini Item
Item Concen.
ML-1M
6,040
3,260
998,539
165.32
0.9493
1.8528
0.5285
0.5862
0.2594
ML-10M
69,878
9,708
9,995,471
143.04
0.9853
7.1980
0.5706
0.7867
0.4945
ML-20M
138,493
15,451
19,964,833
144.16
0.9907
8.9634
0.5802
0.8360
0.5784
ML-25M
162,539
24,330
24,890,566
153.14
0.9937
6.6806
0.5881
0.8711
0.6558
Amazon CD
21,450
18,398
527,503
24.59
0.9987
1.1659
0.4286
0.4274
0.2351
Amazon Games
5,942
3,793
103,778
17.47
0.9954
1.5666
0.2857
0.4028
0.2158
Epinions
10,706
8,945
300,303
28.05
0.9969
1.1969
0.4037
0.4950
0.3055
Ciao
2,136
2,597
59,884
28.04
0.9892
0.8225
0.3982
0.4063
0.2855
Yelp 2015
22,087
14,873
602,517
27.28
0.9982
1.4850
0.4413
0.5121
0.2935
Yelp 2018
39,055
25,033
988,768
25.32
0.9990
1.5601
0.4168
0.5065
0.2888
Gowalla
29,858
40,988
1,027,464
34.41
0.9992
0.7285
0.4666
0.4346
0.2915
CiteULike
3,710
6,468
120,324
32.43
0.9950
0.5736
0.4388
0.3052
0.1818
Pinterest
55,164
9,316
1,460,487
26.48
0.9972
5.9214
0.1411
0.4188
0.1819
All users and items are deleted in Amazon-{music, C&A}
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