
acat(link = "loge", earg = list(),
parallel = FALSE, reverse = FALSE, zero = NULL)
Links
for more choices.earg
in Links
for general information.reverse
is TRUE
then
$\eta_j = \log(P[Y=j]/P[Y=j+1])$
will be used."vglmff"
(see vglmff-class
).
The object is used by modelling functions such as vglm
,
rrvglm
and vgam
.ordered
.Simonoff, J. S. (2003) Analyzing Categorical Data, New York: Springer-Verlag.
Documentation accompanying the
cumulative
,
cratio
,
sratio
,
multinomial
,
pneumo
.data(pneumo)
pneumo = transform(pneumo, let=log(exposure.time))
(fit = vglm(cbind(normal,mild,severe) ~ let, acat, pneumo))
coef(fit, matrix=TRUE)
constraints(fit)
model.matrix(fit)
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