llikExp function

log likelihood and derivatives for exponential distribution

llikExp(x, rate, full = FALSE)

Arguments

• x: variable that is distributed by exponential distribution
• rate: vector of rates.
• full: Add the data frame showing x, mean, sd as well as the fx and derivatives

Returns

data frame with fx for the log pdf value of with dRate

that has the derivatives with respect to the rate parameter the observation time-point

Details

In an rxode2() model, you can use llikExp() but you have to use the x and rate arguments. You can also get the derivative of rate with llikExpDrate().

Examples

llikExp(1, 1:3)

llikExp(1, 1:3, full=TRUE)

# You can use rxode2 for these too:

et <- et(1:3)
et$x <- 1

model <- function() {
  model({
    fx <- llikExp(x, time)
    dRate <- llikExpDrate(x, time)
  })
}

rxSolve(model, et)

Author(s)

Matthew L. Fidler