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VGAM (version 1.1-8)

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)

Value

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

and vgam.

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.

Author

T. W. Yee

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

Run this code
# 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)))

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