janusplot: Asymmetric Smoothed-Association Matrices via GAM Fits

Render a pairwise, asymmetric smoothed-association matrix of continuous variables. Each cell shows the fitted spline from an 'mgcv' generalised additive model, with the upper triangle displaying 'gam(x_j ~ s(x_i))' and the lower triangle 'gam(x_i ~ s(x_j))'. Unlike Pearson's correlation matrix, the visualisation is intentionally asymmetric, revealing heteroscedasticity, leverage, and directional non-linearity that a single scalar correlation hides. An asymmetry index and a 24-category shape taxonomy quantify the directional difference and qualitative form of each fitted smooth.

Version:	0.1.0
Depends:	R (≥ 4.3.0)
Imports:	mgcv (≥ 1.9.0), ggplot2 (≥ 3.5.0), patchwork (≥ 1.1.0), grid, stats, cli (≥ 3.6.0), lifecycle, rlang (≥ 1.1.0)
Suggests:	agridat, future, future.apply, knitr, MASS, palmerpenguins, rmarkdown, testthat (≥ 3.0.0), vdiffr (≥ 1.0.0), withr
Published:	2026-04-28
DOI:	10.32614/CRAN.package.janusplot (may not be active yet)
Author:	Max Moldovan [aut, cre, cph]
Maintainer:	Max Moldovan <max.moldovan at adelaide.edu.au>
BugReports:	https://github.com/max578/janusplot/issues
License:	GPL (≥ 3)
URL:	https://github.com/max578/janusplot, https://max578.github.io/janusplot/
NeedsCompilation:	no
Language:	en-AU
Citation:	janusplot citation info
Materials:	README, NEWS
CRAN checks:	janusplot results

Documentation:

Reference manual:	janusplot.html , janusplot.pdf
Vignettes:	Asymmetric Smoothed-Association Matrices (source, R code) Shape-recognition sensitivity study (source, R code)

Downloads:

Package source:	janusplot_0.1.0.tar.gz
Windows binaries:	r-devel: not available, r-release: not available, r-oldrel: janusplot_0.1.0.zip
macOS binaries:	r-release (arm64): janusplot_0.1.0.tgz, r-oldrel (arm64): janusplot_0.1.0.tgz, r-release (x86_64): not available, r-oldrel (x86_64): not available

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