doi:10.1002/sim.4780141807> and developed as the SITAR method by Cole et al (2010) <doi:10.1093/ije/dyq115>.">

sitar: Super Imposition by Translation and Rotation Growth Curve Analysis (original) (raw)

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: 1.5.0
Depends: nlme, R (≥ 4.1.0)
Imports: dplyr, forcats, ggplot2, glue, graphics, magrittr, methods, purrr, rlang, rsample, splines, splines2, stats, tibble, tidyr
Suggests: knitr, rmarkdown
Published: 2025-07-26
DOI: 10.32614/CRAN.package.sitar
Author: Tim Cole ORCID iD [cre, aut, cph]
Maintainer: Tim Cole <tim.cole at ucl.ac.uk>
BugReports: https://github.com/statist7/sitar/issues
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL: https://github.com/statist7/sitar
NeedsCompilation: no
Materials: README,
CRAN checks: sitar results

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