VGAM (version 1.1-2)

MNSs: The MNSs Blood Group System

Description

Estimates the three independent parameters of the the MNSs blood group system.

Usage

MNSs(link = "logitlink", imS = NULL, ims = NULL, inS = NULL)

Arguments

link

Link function applied to the three parameters. See Links for more choices.

imS, ims, inS

Optional initial value for mS, ms and nS respectively. A NULL means they are computed internally.

Value

An object of class "vglmff" (see vglmff-class). The object is used by modelling functions such as vglm and vgam.

Details

There are three independent parameters: m_S, m_s, n_S, say, so that n_s = 1 - m_S - m_s - n_S. We let the eta vector (transposed) be (g(m_S), g(m_s), g(n_S)) where g is the link function.

References

Elandt-Johnson, R. C. (1971) Probability Models and Statistical Methods in Genetics, New York: Wiley.

See Also

AA.Aa.aa, AB.Ab.aB.ab, ABO, A1A2A3.

Examples

# NOT RUN {
# Order matters only:
y <- cbind(MS = 295, Ms = 107, MNS = 379, MNs = 322, NS = 102, Ns = 214)
fit <- vglm(y ~ 1, MNSs("logitlink", .25, .28, .08), trace = TRUE)
fit <- vglm(y ~ 1, MNSs(link = logitlink), trace = TRUE, crit = "coef")
Coef(fit)
rbind(y, sum(y)*fitted(fit))
sqrt(diag(vcov(fit)))
# }