Package: prinsurf
Type: Package
Title: Principal Surface Biplots
Version: 2.0
Authors@R: c(
    person("Raeesa", "Ganey", role = c("aut", "cre"),
           email = "raeesa.ganey@wits.ac.za"))
Description: Fits principal surfaces (Hastie and Stuetzle, 1989) and
        constructs smooth, predictive biplot axes for them by gradient
        flow: each variable's calibrated axis is the steepest-ascent
        trajectory of its fitted surface coordinate, which is smooth by
        construction, crosses the variable's contour lines
        orthogonally, and reduces to the linear
        principal-component-analysis biplot axis when the surface is
        flat. Variables whose fitted value has an interior extremum
        (closed contours) are detected as non-monotone and the axis is
        withheld in favour of contour-based reading. The implementation
        is base-R only.
License: GPL-3
Encoding: UTF-8
Depends: R (>= 3.5.0)
Imports: stats, graphics, grDevices
Suggests: testthat (>= 3.0.0), knitr, rmarkdown
VignetteBuilder: knitr
NeedsCompilation: no
Packaged: 2026-07-02 21:04:17 UTC; root
Author: Raeesa Ganey [aut, cre]
Maintainer: Raeesa Ganey <raeesa.ganey@wits.ac.za>
Config/roxygen2/version: 8.0.0
Repository: https://raeesaganey91.r-universe.dev
Date/Publication: 2026-07-02 20:08:35 UTC
RemoteUrl: https://github.com/raeesaganey91/prinsurf
RemoteRef: HEAD
RemoteSha: 190eef98bb2cb9f762736bb00c91ad2d0a72f489