cusp: Cusp-Catastrophe Model Fitting Using Maximum Likelihood

Cobb's maximum likelihood method for cusp-catastrophe modeling (Grasman, van der Maas, and Wagenmakers (2009) <doi:10.18637/jss.v032.i08>; Cobb (1981), Behavioral Science, 26(1), 75-78). Includes a cusp() function for model fitting, and several utility functions for plotting, and for comparing the model to linear regression and logistic curve models.

Version: 2.3.6
Imports: stats, graphics, grDevices, utils
Suggests: plot3D
Published: 2022-08-29
DOI: 10.32614/CRAN.package.cusp
Author: Raoul P. P. P. Grasman [aut, cre, cph]
Maintainer: Raoul Grasman <rgrasman at>
License: GPL-2
NeedsCompilation: yes
Citation: cusp citation info
CRAN checks: cusp results


Reference manual: cusp.pdf
Vignettes: the cusp package
cusp package hands on tutorial examples


Package source: cusp_2.3.6.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): cusp_2.3.6.tgz, r-oldrel (arm64): cusp_2.3.6.tgz, r-release (x86_64): cusp_2.3.6.tgz, r-oldrel (x86_64): cusp_2.3.6.tgz
Old sources: cusp archive


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