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sitar

Growth curve analysis

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Install

install.packages('sitar')

Monthly Downloads

600

Version

1.0.9

License

GPL (>= 2)

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Repository

https://github.com/statist7/sitar

Maintainer

Tim Cole

Last Published

January 9th, 2017

Functions in sitar (1.0.9)

Plot and zap velocity outliers in growth curves

Function call with optional inverse

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

Create cubic smoothing spline from data

Extract elements of fitted SITAR models

Compare Likelihoods of Fitted SITAR Objects

Ways to compare SITAR models for fit

LMS conversion to and from z-scores

Invert an expression defining a data transformation

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

Predict SITAR model

Plot multiple growth curves to identify outliers

Print SITAR model

print.summary.sitar

Print summary of SITAR model

Recalibrate x, y data using SITAR random effects

SITAR (SuperImposition by Translation And Rotation) growth curve analysis

Plot multiple growth curves

Plot SITAR model

Fit SITAR growth curve model

Sample from SITAR dataset

Plot with two y axes

Express z-scores as centile character strings for plotting

Create summary of SITAR model

Identify outliers with abnormal velocity in growth curves

Select equally spaced ages from a vector of ages

Par args xaxs and yaxs option d