
Dataset used in <em>Data Analysis Using Regression and Multilevel/Hierarchical Models</em>
by Andrew Gelman and Jennifer Hill (Cambridge University Press, 2006). Rows with missing
values of 'CD4CNT', 'visage' or 'baseage' have been removed.


datasets

Allows Brownian motion, fractional Brownian motion,
and integrated Ornstein-Uhlenbeck process components to
be added to linear and non-linear mixed effects models
using the structures and methods of the 'nlme' package.

Oliver Stirrup

covBM

Brownian Motion Processes for 'nlme'-Models

cd4 function

A data frame with 976 rows and 11 variables:
<dl>
  <dt>newpid</dt><dd>Patient ID code.</dd> <dt>t</dt><dd>Time, in years from first visit.</dd> <dt>sqrtcd4</dt><dd>Square root of CD4 count.</dd> <dt>treatmnt</dt><dd>Indicator variable for treatment, 1 represents control group and 2 indicates zinc treatment group.</dd> <dt>CD4CNT</dt><dd>CD4 count on original (untransformed) scale.</dd> <dt>baseage</dt><dd>Age of child in years at initial visit.</dd> <dt>visage</dt><dd>Age of child in years at given visit.</dd> </dl>

Format

<a href="http://www.stat.columbia.edu/~gelman/arm/examples/cd4/">http://www.stat.columbia.edu/~gelman/arm/examples/cd4/</a>

cd4: Serial CD4 counts in children with HIV.

Description

Usage

Arguments

Format

Source