NEWS.md

brokenstick 1.1.0

This version adds a couple of minor alterations.

brokenstick 1.0.0

brokenstick 0.78.0

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brokenstick 0.75.0

brokenstick 0.72.1

brokenstick 0.72.0

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brokenstick 0.70.1

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brokenstick 0.62.0

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brokenstick 0.55

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brokenstick 0.53

Here is the abstract of the lecture:

Broken stick model for individual growth curves

Stef van Buuren

1) Netherlands Organization for Applied Scientific Research TNO 2) Utrecht University

The broken stick model describes a set of individual curves by a linear mixed model using second-order linear B-splines. The model can be used

The user specifies a set of break ages at which the straight lines connect. Each individual obtains an estimate at each break age, so the set of estimates of the individual form a smoothed version of the observed trajectory.

The main assumptions of the broken stick model are that the development between the break ages follows a straight line, and that the broken stick estimates follow a common multivariate normal distribution. In order to conform to the assumption of multivariate normality, the user may fit the broken stick model on suitably transformed data that yield the standard normal (Z-score) scale.

This lecture outlines the model and introduces the brokenstick R package.



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brokenstick documentation built on Nov. 2, 2020, 5:07 p.m.