3.3.2

New Features

• Enhanced plot.drc(): added errbar.lwd parameter for independent control of error bar line width in type = "bars" plots. When NULL (default), error bars inherit the line width from the lwd argument or fall back to par("lwd").

Bug Fixes

• Fixed update.drc() to fall back to stored data (object$origData) when call$data cannot be resolved in the calling frame, enabling use of update() inside lapply(), purrr::map(), and other functional programming contexts.
• Fixed vcDisc() to validate that the inverse Hessian has non-negative variances before returning, preventing invalid variance-covariance matrices from propagating downstream.

Changes

• Tightened default relTol in drmc() from 1e-7 to 1e-10 for improved cross-platform reproducibility of optimization results.
• Added comparative analysis vignette (comparative-analysis.Rmd) documenting differences between hreinwald/drc and the original DoseResponse/drc package.
• Added "Articles" section to pkgdown navigation in _pkgdown.yml with categorized guides and technical reports.
• Fixed flaky maED tests that depended on platform-specific convergence behavior.
• Added test suites for boxcox.drc (functional programming context), update.drc (data resolution fallback), and vcDisc (singular Hessian handling).