# pratio: Calculation of Psi(psi) In Yuande/MBttest: Multiple Beta t-Tests

## Description

Psi is also called polar ratio.

ψ = max(\frac{min(X_A)}{max(X_B)+1},\frac{min(X_B)}{max(X_A)+1})

.

## Usage

 1 pratio(xx, na, nb) 

## Arguments

 xx count data of RNA reads generated by next generation sequencing. na number of replicate libraries in condition A. nb number of replicate libraries in condition B.

## Details

Psi is defined as

ψ = max(\frac{min(X_A)}{max(X_B)+1},\frac{min(X_B)}{max(X_A)+1})

It is used to measure overlap of two subdatasets. ψ>1, these two subdatasets have a gap, not overlap. ψ<1 indicates that two subdatasets overlap.

## Value

 pratio pratio list

## Author(s)

Yuan-De Tan [email protected]

## References

Yuan-De Tan Anita M. Chandler, Arindam Chaudhury, and Joel R. Neilson(2015) A Powerful Statistical Approach for Large-scale Differential Transcription Analysis. Plos One. 2015 DOI: 10.1371/journal.pone.0123658.

mbetattest, oddratio
 1 2 3 4 5 6 7 8 XX<-matrix(NA,2,8) XX[1,]<-c(112,122, 108,127,302, 314, 322, 328) XX[2,]<-c(511, 230, 754, 335,771, 842, 1014,798) #XX # [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] #[1,] 112 122 108 127 302 314 322 328 #[2,] 511 230 754 335 771 842 1014 798 pratio(xx=XX,na=4,nb=4)