- SSG Home
- Courses & Events
- 5th NIGMS Short Course
- Microarray Projects
- Linkage & Association Projects
- Janet L. Norwood Award
- Activities in News
- Contact Information
- SSG Members Only
Imputation Algorithm for Genetic Data
R programs for imputation of microarray gene expression data
- Simulation program
This program simulates Affymetrix GeneChips using the model of Stevens and Doerge (2005).
- Analysis program
This program analyzes differential expression for Affymetrix GeneChip data using single and multiple imputation. Portions of the R source code are based on the random variance model (RVM; Wright and Simon, 2003, http://linus.nci.nih.gov/BRB-ArrayTools.html) and the COMBCHI SAS macro (http://www.ssc.upenn.edu/~allison/combchi.sas).
- Combine Results
This program combines results of a batch of analyses from the programs above.
R programs for imputation of pedigree genetic data
- Mig Package
The 'Mig' package stands for multiple imputation in genetics. The main focus was to develop methods for multiple imputation of pedigree data both genotype and covariate imputation. This package consists of two functions
- miCovariate - To impute covariate data. The details of the input, output and method are available at (MI_Covariate.pdf)
- miGenotype - To impute genotype for a single marker. The details of the input, output and method are available at (MI_GenotypeImputation.pdf)
This package has man pages that describe the above two fuctions and small R demo that will run a small example of these functions. We provide the package as Windows binary and tar.gz that can be built separately on any Linux machine.