sitar: Super Imposition by Translation and Rotation Growth Curve Analysis

Functions for fitting and plotting SITAR (Super Imposition by Translation And Rotation) growth curve models. SITAR is a shape-invariant model with a regression B-spline mean curve and subject-specific random effects on both the measurement and age scales. The model was first described by Lindstrom (1995) <doi:10.1002/sim.4780141807> and developed as the SITAR method by Cole et al (2010) <doi:10.1093/ije/dyq115>.

Version: 1.4.0
Depends: nlme, R (≥ 3.0.0)
Imports: dplyr, forcats, ggplot2, glue, purrr, rlang, rsample, stats, tibble, tidyr, magrittr
Suggests: knitr, rmarkdown
Published: 2023-06-23
DOI: 10.32614/CRAN.package.sitar
Author: Tim Cole ORCID iD [cre, aut, cph]
Maintainer: Tim Cole <tim.cole at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Materials: README NEWS
CRAN checks: sitar results


Reference manual: sitar.pdf
Vignettes: Fitting models with SITAR
Optimal design for growth reference centiles


Package source: sitar_1.4.0.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): sitar_1.4.0.tgz, r-oldrel (arm64): sitar_1.4.0.tgz, r-release (x86_64): sitar_1.4.0.tgz, r-oldrel (x86_64): sitar_1.4.0.tgz
Old sources: sitar archive

Reverse dependencies:

Reverse imports: bsitar, MonoInc, nlive


Please use the canonical form to link to this page.