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sitar

Growth curve analysis

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Install

install.packages('sitar')

Monthly Downloads

675

Version

1.0.8

License

GPL (>= 2)

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Repository

https://github.com/statist7/sitar

Maintainer

Tim Cole

Last Published

October 18th, 2016

Functions in sitar (1.0.8)

Extract elements of fitted SITAR models

Ways to compare SITAR models for fit

Invert an expression defining a data transformation

LMS conversion to and from z-scores

Update the b fixed effect to minimise the b-c random effect correlation

Convert to/from measurement from/to z-score with growth reference

Create cubic smoothing spline from data

Plot and zap velocity outliers in growth curves

Compare Likelihoods of Fitted SITAR Objects

Function call with optional inverse

Recalibrate x, y data using SITAR random effects

Plot multiple growth curves to identify outliers

Fit SITAR growth curve model

Plot multiple growth curves

print.summary.sitar

Print summary of SITAR model

Sample from SITAR dataset

Print SITAR model

Predict SITAR model

Plot SITAR model

SITAR (SuperImposition by Translation And Rotation) growth curve analysis

Par args xaxs and yaxs option d

Identify outliers with abnormal velocity in growth curves

Plot with two y axes

Express z-scores as centile character strings for plotting

Select equally spaced ages from a vector of ages

Create summary of SITAR model