mixpar: Parameters for DNA mixture models

In DNAmixturesLite: Statistical Inference for Mixed Traces of DNA (Lite-Version)

Parameters for DNA mixture models

Description

IMPORTANT: This is the DNAmixturesLite package, which is intended as a service to enable users to try DNAmixtures without purchasing a commercial licence for Hugin. When at all possible, we strongly recommend the use of DNAmixtures rather than this lite-version. See https://dnamixtures.r-forge.r-project.org/ for details on both packages.

While the lite-version seeks to provide the full functionality of DNAmixtures, note that computations are much less efficient and that there are some differences in available functionality. Be aware that the present documentation is copied from DNAmixtures and thus may not accurately describe the implementation of this lite-version.

Usage

mixpar(rho = NULL, eta = NULL, xi = NULL, phi = NULL, parlist = NULL)

## S3 method for class 'mixpar'
print(x, digits = max(3L, getOption("digits") - 3L), scientific = FALSE, ...)

Arguments

rho	Amplification factor.
eta	Scale parameter in the gamma distribution.
xi	Stutter parameter.
phi	Named vector of the fraction of DNA contributed by each contributor.
parlist	A list of parameters of class mixpar
x	An object of class mixpar.
digits	The number of digits to print
scientific	Should scientific notation be used?
...	arguments passed to print

Details

The mixture parameter is a two-way array of lists; columns correspond to the four model parameters rho, eta, xi, and phi, and rows correspond to the mixtures included in the model.

The print method is currently somewhat specialised, in that it assumes that rho, eta, and xi are merely real numbers. phi is assumed to consist of a named vector per mixture; the names, or order of names, can differ between mixtures.

Value

An object of class "mixpar".

Author(s)

Therese Graversen

Examples

## A parameter for two mixtures
q <- mixpar(rho = list(30, 30), eta = list(30, 30), xi = list(0.08, 0.08),
            phi = list(c(Anna = 0.5, Peter = 0.2, U1 = 0.3),
                       c(U1 = 0.5, Anna = 0.2, Peter = 0.3)))
## Equivalent to specifying the parameter for each mixture and then combining.
p1 <- mixpar(rho = list(30), eta = list(30), xi = list(0.08),
             phi = list(c(Anna = 0.5, Peter = 0.2, U1 = 0.3)))
p2 <- mixpar(rho = list(30), eta = list(30), xi = list(0.08),
             phi = list(c(U1 = 0.5, Anna = 0.2, Peter = 0.3)))
p <- mixpar(parlist = list(p1, p2))

DNAmixturesLite documentation built on March 31, 2023, 8:21 p.m.