R/mbmixture is an R package for evaluating whether a microbiome sample is the mixture of two source samples. We are thinking of shotgun sequencing data on the microbiome sample plus dense SNP genotype data on the two potential source samples. We assume that the data has been reduced to a three-dimensional array of read counts: the 3 possible SNP genotypes for the first sample × the 3 possible SNP genotypes of the second sample × the 2 possible SNP alleles on the reads.
We fit a model with contaminant probability p = proportion of the microbiome sample coming from the second sample and e = rate of sequencing errors.
Then install R/mbmixture using the
install_github function in the
devtools package. (With
build_vignettes=TRUE, the vignette will be built and installed.)
library(devtools) install_github("kbroman/mbmixture", build_vignettes=TRUE)
A vignette describing the use of the package is available
on the web.
Or view it from within R by load the package and then using the
library(mbmixture) vignette("mbmixture", package="mbmixture")