XHWE: Likelihoodfun – R documentation

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XHWE

Likelihoodfun

Calculating log-Likelihood Function

Description

Calculate the natural logarithm of the likelihood function.

Usage

Likelihoodfun(p1m, p2f, p1f, n1m, n0m, n2f, n1f, n0f)

Arguments

`p1m`	The male allele frequency of allele 1.
`p2f`	The female genotype frequency of genotype (1, 1).
`p1f`	The female genotype frequency of genotype (1, 2).
`n1m`	The number of males with allele 1.
`n0m`	The number of males with allele 2.
`n2f`	The number of females with genotype (1, 1).
`n1f`	The number of females with genotype (1, 2).
`n0f`	The number of females with genotype (2, 2).

Details

The values of p1m, p2f and p1f should be from 0 to 1, otherwise NaN is presented.

Value

The function returns the value of the natural logarithm of the likelihood function.

Author(s)

Xiao-Ping You, Qi-Lei Zou, Jian-Long Li, Ji-Yuan Zhou

References

You XP, Zou QL, Li JL, Zhou JY. 2015 Likelihood Ratio Tests for Hardy-Weinberg Equilibrium at Marker Loci on X Chromosome. (submitted)

Zheng G, Joo J, Zhang C, Geller NL. 2007 Testing Association for Markers on the X Chromosome. Genetic Epidemiology, 31: 834-843.

Dempster AP, Laird NM, Rubin DB. 1977 Maximum Likelihood from Incomplete Data via the EM algorithm. Journal of the Royal Statistical Society Series B(Methodological), 39: 1-38.