Group Recommender Systems Based on Members’ Preference for Trusted Social Networks

Algorithm 1

GRIMPFTSN.

	Input: Ratingmatrix, Trustmatrix
	Output: MAE
	Initial: Pro (u, i), TR (u, i) by RS methods
	Repeat
	Gpro (G, i) by GRS for the average strategy
	If TR (u, i) = = null then
	Pre (G, i) = Gpro (G, i)
	else
	Gpro (G, i) = = null,
	Pre (G, i) = TR (u, i)
	else
	Pre (G, i) =
	from dis and standard value
	End if
	Until MAE