llikNbinom {rxode2}

Calculate the log likelihood of the negative binomial function (and its derivatives)

Description

Calculate the log likelihood of the negative binomial function (and its derivatives)

Usage

llikNbinom(x, size, prob, full = FALSE)

Arguments

x

Number of successes

size

Size of trial

prob

probability of success

full

Add the data frame showing x, mean, sd as well as the fx and derivatives

Details

In an rxode2() model, you can use llikNbinom() but you have to use all arguments. You can also get the derivative of prob with llikNbinomDprob()

Value

data frame with fx for the pdf value of with dProb that has the derivatives with respect to the parameters at the observation time-point

Author(s)

Matthew L. Fidler

Examples

llikNbinom(46:54, 100, 0.5)

llikNbinom(46:54, 100, 0.5, TRUE)

# In rxode2 you can use:

et <- et(46:54)
et$size <- 100
et$prob <-0.5

model <- function() {
  model({
    fx <- llikNbinom(time, size, prob)
    dProb <- llikNbinomDprob(time, size, prob)
  })
}

rxSolve(model, et)