otpospoisson | R Documentation |
Estimating the (single) parameter of the 1-truncated positive Poisson distribution.
otpospoisson(llambda = "loglink",
type.fitted = c("mean", "lambda", "prob0", "prob1"),
ilambda = NULL, imethod = 1, zero = NULL)
llambda , type.fitted , ilambda |
Same as |
imethod , zero |
Same as |
The 1-truncated positive Poisson distribution has support on 2, 3,
....
It is a Poisson distribution but with
the probability of a one or zero being 0. The other
probabilities are scaled to add to unity.
Some more details can be found at pospoisson
.
Multiple responses are permitted.
An object of class "vglmff"
(see vglmff-class
).
The object is used by modelling functions
such as vglm
,
and vgam
.
T. W. Yee
Otpospois
,
oipospoisson
,
simulate.vlm
.
## Not run:
odata <- data.frame(y1 = rotpospois(1000, lambda = loglink(1, inv = TRUE)))
ofit <- vglm(y1 ~ 1, otpospoisson, data = odata, trace = TRUE, crit = "c")
coef(ofit, matrix = TRUE)
Coef(ofit)
with(odata,
hist(y1, prob = TRUE, breaks = seq(0.5, max(y1) + 0.5, by = 1),
border = "blue"))
x <- seq(1, with(odata, max(y1)), by = 1)
with(odata, lines(x, dotpospois(x, Coef(ofit)[1]), col = "orange",
type = "h", lwd = 2))
## End(Not run)
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