NEWS

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swjm 0.1.2

• Corrected the stagewise update directions under the scaled penalties. The argmax of the update objective over the scaled-penalty unit ball carries a factor 1/xi on every death-model coordinate (scaled lasso and mixed-sign cooperative branches: e_j sgn(g)/xi; group and same-sign cooperative branches: (g_a, g_b/xi^2)/||(g_a, g_b/xi)||_2). Earlier versions used unit-norm directions in rescaled gradient coordinates, which under-stepped the death-model block by the rescaling factor at every iteration and systematically over-shrank death-model coefficients.
• The gradient-rescaling factor is now frozen at its initial value, so each fit emulates a single fixed scaled penalty and the solution paths are well behaved.
• Results computed with earlier versions of the package will differ, particularly death-model coefficient estimates and selection summaries.