sitar: Super Imposition by Translation and Rotation Growth CurveAnalysis
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 [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,NEWS |
| CRAN checks: | sitar results |
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