R package hsm: A Path-Based BCD for Proximal Function of Latent Group Lasso. Implementation of the block coordinate descent procedure for solving the proximal function of latent group Lasso, highlighted by decomposing a DAG into several non-overlapping path graphs, and getting closed-form solution for each path graph. The procedure was introduced as Algorithm 4 in Yan and Bien (2015) <https://arxiv.org/abs/1512.01631> ”Hierarchical Sparse Modeling: A Choice of Two Regularizers”, and the closed-form solution for each path graph is solved in Algorithm 3 of that paper.

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