rigff {VGAM} | R Documentation |
Estimation of the parameters of a reciprocal inverse Gaussian distribution.
rigff(lmu = "identitylink", llambda = "loge", imu = NULL, ilambda = 1)
lmu, llambda |
Link functions for |
imu, ilambda |
Initial values for |
See Jorgensen (1997) for details.
An object of class "vglmff"
(see vglmff-class
).
The object is used by modelling functions such as vglm
,
and vgam
.
This distribution is potentially useful for dispersion modelling.
T. W. Yee
Jorgensen, B. (1997) The Theory of Dispersion Models. London: Chapman & Hall
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)