Tools for estimating and predicting the cosinor model

cosinor is 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.


cosinor 1.1

  • Added shiny app function
  • Fixed bug where plot with no covariates failed.
  • Fixed bug to allow as.factor inside specials of formula.
  • Added references.

cosinor 1.0

  • First release

Reference manual

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1.1 by Michael Sachs, 3 years ago

Browse source code at

Authors: Michael Sachs <>

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports ggplot2, shiny

Suggests knitr

Depended on by cosinor2.

See at CRAN