ancestor.find           Find ancestor nodes for a node in directed
                        acyclic graph.
hsm                     Solves proximal operator of latent group lasso
                        in Hierarchical Sparse Modeling.
hsm-package             Block coordinate descent based on path graphs
                        for proximal operator of latent group Lasso
hsm.path                Solves proximal operator of latent group Lasso
                        over a grid of lam values.
lam.max.hsm             Computes the smallest lam value such that beta
                        = 0.
path.find               Find all path graphs originated from a given
                        root.
paths                   Generate 'assign' and 'w.assign'.
