Gender

Age

Occupation

Education

Learning interest

Learning pattern

Forum

participation

User1

0

35

[0, 1, 0, 0]

[0, 1, 0, 0]

[0, 2, 1, …, 1]

[1, 1, 0]

6

User2

1

22

[1, 0, 0, 0]

[0, 0, 0, 1]

[0, 5, 1, …, 0]

[1, 1, 0]

2

User3

1

44

[0, 0, 1, 0]

[0, 0, 1, 0]

[1, 0, 7, …, 0]

[1, 0, 1]

0

…

…

…

…

…

…

…

…