update_alpha {M2SMF}

the function to update alpha

Description

update the sub-matrix alpha to convergence to its local minimum gradually

Usage

update_alpha(WL, update_L_list, lambda)

Arguments

WL

A list of similarity matrices

update_L_list

A list with N+2 elements, the former N as modality private sub-matrices, the Nth as the shared sub-matrix and the last one as the current loss

lambda

A parameter to set the relative weight of the group sparsity constraints

Value

A list containing the updated result in this iteration

Author(s)

Xiaoyao Yin

Examples

WL <- simu_data_gen()
WL[[1]] <- affinityMatrix(dist2eu(Standard_Normalization(WL[[1]]),Standard_Normalization(WL[[1]])))
WL[[2]] <- affinityMatrix(dist2eu(Standard_Normalization(WL[[2]]),Standard_Normalization(WL[[2]])))
new_WL_list <- initialize_WL(WL)
k <- 5
lambda <- 0.25
init_list <- initialization(new_WL_list,k)
update_L_list <- update_L(new_WL_list,init_list)
update_alpha_list <- update_alpha(WL,update_L_list,lambda)