ShapeChange: Change-Point Estimation using Shape-Restricted Splines

In a scatterplot where the response variable is Gaussian, Poisson or binomial, we consider the case in which the mean function is smooth with a change-point, which is a mode, an inflection point or a jump point. The main routine estimates the mean curve and the change-point as well using shape-restricted B-splines. An optional subroutine delivering a bootstrap confidence interval for the change-point is incorporated in the main routine.

Version: 1.5
Depends: coneproj (≥ 1.11), quadprog (≥ 1.5-5), R (≥ 3.2.0)
Suggests: stats, MASS, graphics, grDevices, utils
Published: 2023-09-06
DOI: 10.32614/CRAN.package.ShapeChange
Author: Xiyue Liao and Mary C Meyer
Maintainer: Xiyue Liao <xliao at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
CRAN checks: ShapeChange results


Reference manual: ShapeChange.pdf


Package source: ShapeChange_1.5.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): ShapeChange_1.5.tgz, r-oldrel (arm64): ShapeChange_1.5.tgz, r-release (x86_64): ShapeChange_1.5.tgz, r-oldrel (x86_64): ShapeChange_1.5.tgz
Old sources: ShapeChange archive


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