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sitar  

Super Imposition by Translation and Rotation Growth Curve Analysis
View on CRAN: Click here


Download and install sitar package within the R console
Install from CRAN:
install.packages("sitar")

Install from Github:
library("remotes")
install_github("cran/sitar")

Install by package version:
library("remotes")
install_version("sitar", "1.5.0")



Attach the package and use:
library("sitar")
Maintained by
Tim Cole
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2014-04-08
Latest Update: 2025-07-26
Description:
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>.
How to cite:
Tim Cole (2014). sitar: Super Imposition by Translation and Rotation Growth Curve Analysis. R package version 1.5.0, https://cran.r-project.org/web/packages/sitar. Accessed 25 Jun. 2026.
Previous versions and publish date:
1.0.1 (2014-06-27 13:56), 1.0.2 (2015-04-21 16:23), 1.0.3 (2015-07-27 20:19), 1.0.4 (2016-03-23 00:31), 1.0.5 (2016-04-12 12:15), 1.0.6 (2016-05-05 23:43), 1.0.7 (2016-07-31 17:24), 1.0.8 (2016-10-18 00:57), 1.0.9 (2017-01-09 09:50), 1.0.10 (2017-09-15 23:13), 1.0 (2014-04-08 11:07), 1.1.0 (2018-06-19 13:57), 1.1.1 (2019-03-12 17:30), 1.1.2 (2020-02-17 16:40), 1.2.0 (2021-04-22 16:10), 1.3.0 (2022-07-20 17:40), 1.4.0 (2023-06-23 17:50)
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