The R package splines2 is a supplementary package on splines providing functions constructing B-splines, integral of B-splines, monotone splines (M-splines) and its integral (I-splines), convex splines (C-splines), and their derivatives of given order. Piecewise constant basis is allowed for B-spline and M-spline basis.

Installation of CRAN Version

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You can install the released version from CRAN.



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The latest version of package is under development at GitHub in branch dev. If it is able to pass the building check by Travis CI, you may consider installing it with the help of remotes by

if (! require(remotes)) install.packages("remotes")
remotes::install_github("wenjie2wang/splines2", ref = "dev")

Getting Started

The package vignette provides a quick demonstration for the basic usage of the main functions.


The R package splines2 is free software: You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version (at your option). See the GNU General Public License for details.

The R package splines2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.