| chisq {VGAM} | R Documentation |
Maximum likelihood estimation of the degrees of freedom for a chi-squared distribution.
chisq(link = "loge", earg=list())
link |
Parameter link function.
See Links for more choices.
|
earg |
List. Extra argument for the link.
See earg in Links for general information.
|
The degrees of freedom is treated as a parameter to be estimated. It is treated as real and not integer. Being positive, a log link is used by default.
An object of class "vglmff" (see vglmff-class).
The object is used by modelling functions such as vglm,
and vgam.
There may be convergence problems if the degrees of freedom is very large.
T. W. Yee
Evans, M., Hastings, N. and Peacock, B. (2000) Statistical Distributions, New York: Wiley-Interscience, Third edition.
y = rchisq(n=200, df=exp(2)) fit = vglm(y ~ 1, chisq) coef(fit, matrix=TRUE) Coef(fit)