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sitar

Super Imposition by Translation and Rotation Growth Curve Analysis

v1.5.0 · Jul 26, 2025 · GPL (>= 2)

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>.

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OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 9, 2026

Reverse Dependencies (2)

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Dependency Network

Dependencies Reverse dependencies nlme dplyr forcats ggplot2 glue magrittr purrr rlang rsample splines2 tibble tidyr bsitar nlive sitar

Version History

new 1.5.0 Mar 9, 2026