vitamind

<p>Simulated data set to illustrate the cosinor model. <code>Y</code>
is an outcome variable that varies of time <code>time</code> according
to a cosine curve. The binary covariate <code>X</code> is associated with the
mean and amplitude of the cosine curve.</p>

datasets

A set of simple functions that transforms longitudinal
data to estimate the cosinor linear model as described in Tong (1976).
Methods are given to summarize the mean, amplitude and acrophase, to
predict the mean annual outcome value, and to test the coefficients.

Michael Sachs

cosinor

Tools for Estimating and Predicting the Cosinor Model

vitamind function

<p>A data frame with 3 variables: <code>X</code>, <code>Y</code>,
  <code>time</code>.</p>

vitamind: Vitamin D

Description

Usage

Arguments

Format