Q.func: An auxiliary function in FISTA algorithm
Description
Auxiliary function for FISTA implementation
Usage
Q.func(x, y, A, b, L, AtA, Atb)
Arguments
x
Model parameter for previous update
y
Model parameter for updating
b
A correspond vector, or matrix with size of n by 1 or n by p
AtA
Gram matrix for design matrix A
Atb
Inner product for design matrix A and correspond vector b