VGAM (version 1.0-4)

rigff: Reciprocal Inverse Gaussian distribution

Description

Estimation of the parameters of a reciprocal inverse Gaussian distribution.

Usage

rigff(lmu = "identitylink", llambda = "loge", imu = NULL, ilambda = 1)

Arguments

lmu, llambda

Link functions for mu and lambda. See Links for more choices.

imu, ilambda

Initial values for mu and lambda. A NULL means a value is computed internally.

Value

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

Details

See Jorgensen (1997) for details.

References

Jorgensen, B. (1997) The Theory of Dispersion Models. London: Chapman & Hall

See Also

simplex.

Examples

# NOT RUN {
rdata <- data.frame(y = rchisq(n = 100, df = 14))  # Not 'proper' data!!
fit <- vglm(y ~ 1, rigff, data = rdata, trace = TRUE)
fit <- vglm(y ~ 1, rigff, data = rdata, trace = TRUE, eps = 1e-9, crit = "coef")
summary(fit)
# }