mixlr
Mixture likelihood ratio
mixlr(p, np, xp, nd, xd)crimlab.mixlr(p, np, xp, nd, xd)crimlab mixlr --p VALUE --np VALUE --xp VALUE --nd VALUE --xd VALUEThe weight of a DNA mixture at one locus for one account of who
contributed against another. Each account names the alleles of the
mixture its known contributors do not explain and the number of unknown
contributors who must explain them. Peak heights, drop-out and coancestry
are not modelled. See proof("mixlr").
Parameters
Section titled “Parameters”pThe population frequencies of the alleles in the mixture: named numbers above 0 with a sum of at most 1.
np, ndThe alleles left unexplained under the first and the second account: names of
p(orcharacter(0)), at most 20.xp, xdThe number of unknown contributors under each account.
Returns
Section titled “Returns”A named numeric vector: num, den and lr.
With no alleles to explain and one unknown, the denominator is the chance a random person is not excluded from the mixture.
References
Section titled “References”Weir, B. S., Triggs, C. M., Starling, L., Stowell, L. I., Walsh, K. A. J. and Buckleton, J. (1997). Interpreting DNA mixtures. Journal of Forensic Sciences, 42(2), 213-222.
Examples
Section titled “Examples”# victim explains a and b; suspect would explain c and dp <- c(a = 0.1, b = 0.2, c = 0.05, d = 0.15)mixlr(p, np = character(0), xp = 0, nd = c("c", "d"), xd = 1)Generated from the R help page: mixlr in the R reference.