VsusP 1.1.0

Gaussian fitting and summaries

• Add FitRidge(), FitHorseshoe() and FitSpikeSlab() with explicit priors, intercept draws and separate chain axes. Existing bayesreg defaults remain.
• Add coefficient summaries, posterior and sparse prediction, PosteriorDraws() and ChainDiagnostics(). Add coefficient, inclusion, trace and autocorrelation plots that return the displayed values invisibly.

Selection methods

• Add TwoMeansBeta() for basic two-means selection and SpikeSlabSelection() for exact-zero inclusion summaries and visited-model frequencies.
• Add SAVS and the adaptive-L1 DSS approximation as separate methods that can return an empty selection. Document scaling, tuning and numerical limits.
• Add exact one-dimensional clustering, recursive-pair refinement and S2MSensitivity(). Randomized kmeans and legacy small-set stopping remain the defaults; sensitivity summaries do not choose an optimal threshold.
• Allow all-zero S2M draws with zero.draws = "empty"; default rejection remains.

Fixes

• Retain the saved S2M noise set at recursive stopping, following Li and Pati (2017), Section 2.2.1, doi:10.1016/j.csda.2016.10.008. The previous count used the smaller cluster from the stopping split and could select too many signals. The strict center-gap comparison is unchanged.
• Handle distinct initial pairs and indivisible recursive candidates. Reject unsupported constant-magnitude draws; accept explicit H = 0 selections.
• Validate dimensions, finite values, scalar counts and tuning ranges.
• Return consistent selection summaries and use every returned sampler draw.
• Accept prior aliases rr, hs and hs+; preserve predictor names without allowing a predictor name to replace the response.
• Correct citations, draw orientation and tuning-plot descriptions. Document tie conventions and empty-model limits.

Documentation and checks

• Add eight reproducible figures and worked fitting, selection and prediction examples. Retain the exploratory pilot’s outcomes and limitations.
• Remove tracked build products and duplicate documentation. Run one package check per CI job and retain strict test-count and coverage verification.