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R code for fitting Random Periods Model

R code for fitting Random Periods Model - Software Usage Agreement and Download

Developed by:

Shyamal D. Peddada
National Institute of Environmental Health Sciences
Biostatistics Branch

Programmed by Mr. Sai Cheemalapati, Summer Intern 2011, Panther Creek High School


You may use this R code for fitting the Random Periods Model (RPM) for cell cycle genes. Since outliers and influential observations are not uncommon, the parameters of RPM are estimated using the L_1 norm. The RPM is a nonlinear model that can be used to model the expression of a cell-cycle gene over time. For details regarding the model one may refer to Liu et al. (2004).

Software info

Details on how to use is provided in the How to Use R code for Fitting Random Periods Model webpage.


Liu D, Umbach D, Peddada SD, Li L, Crockett P and Weinberg C (2004). A Random-Periods Model for Expression of Cell-Cycle Genes. Proceedings of National Academy of Sciences, 101, No. 19, 7240-7245.


CCOptimF.R (2KB) 


Clarice R. Weinberg, Ph.D.
Principal Investigator
Tel 984-287-3697

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