gap (version 1.5-1)

bt: Bradley-Terry model for contingency table

Description

This function calculates statistics under Bradley-Terry model.

Usage

bt(x)

Value

The returned value is a list containing:

y

A column of 1

count

the frequency count/weight

allele

the design matrix

bt.glm

a glm.fit object

etdt.dat

a data table that can be used by ETDT

Arguments

x

the data table.

Author

Jing Hua Zhao

References

Bradley RA, Terry ME (1952) Rank analysis of incomplete block designs I. the method of paired comparisons. Biometrika 39:324--345

Sham PC, Curtis D (1995) An extended transmission/disequilibrium test (TDT) for multi-allelic marker loci. Ann. Hum. Genet. 59:323-336

See Also

mtdt

Examples

if (FALSE) {
# Copeman JB, Cucca F, Hearne CM, Cornall RJ, Reed PW, 
# Ronningen KS, Undlien DE, Nistico L, Buzzetti R, Tosi R, et al.
# (1995) Linkage disequilibrium mapping of a type 1 
# diabetes susceptibility gene (IDDM7) to chromosome 2q31-q33. 
# Nat Genet 9: 80-5

x <- matrix(c(0,0, 0, 2, 0,0, 0, 0, 0, 0, 0, 0,
              0,0, 1, 3, 0,0, 0, 2, 3, 0, 0, 0,
              2,3,26,35, 7,0, 2,10,11, 3, 4, 1,
              2,3,22,26, 6,2, 4, 4,10, 2, 2, 0,
              0,1, 7,10, 2,0, 0, 2, 2, 1, 1, 0,
              0,0, 1, 4, 0,1, 0, 1, 0, 0, 0, 0,
              0,2, 5, 4, 1,1, 0, 0, 0, 2, 0, 0,
              0,0, 2, 6, 1,0, 2, 0, 2, 0, 0, 0,
              0,3, 6,19, 6,0, 0, 2, 5, 3, 0, 0,
              0,0, 3, 1, 1,0, 0, 0, 1, 0, 0, 0,
              0,0, 0, 2, 0,0, 0, 0, 0, 0, 0, 0,
              0,0, 1, 0, 0,0, 0, 0, 0, 0, 0, 0),nrow=12)

# Bradley-Terry model, only deviance is available in glm
# (SAS gives score and Wald statistics as well)
bt.ex<-bt(x)
anova(bt.ex$bt.glm)
summary(bt.ex$bt.glm)
}