Recommendation method combining multi-class untrust relation based on collaborative filtering
A collaborative filtering and recommendation method technology, applied in the field of recommendation systems, can solve problems affecting the development of collaborative filtering recommendation methods
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[0029] Embodiments of the present invention will now be described with reference to the accompanying drawings.
[0030] 1. User preference information for categories
[0031] Step ①: Eliminate the category of the item (such as movies, clothes, electrical appliances, etc.) to define the category of the recommended method;
[0032] Step ②: Combine figure 1 As shown in the input scoring matrix, the number of items belonging to category k in the scoring behavior generated by user u and the number of all items in the scoring behavior generated by user u are obtained from the input scoring matrix. The ratio of the number of rating actions to the total number of items for which users generate rating actions, specifically:
[0033] f u ( k ) = n u ( k ) ...
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