log likelihood and derivatives for exponential distribution

log likelihood and derivatives for exponential distribution

Usage

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

Value

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

Author

Matthew L. Fidler

Examples

llikExp(1, 1:3)
#>          fx      dRate
#> 1 -1.000000  0.0000000
#> 2 -1.306853 -0.5000000
#> 3 -1.901388 -0.6666667

llikExp(1, 1:3, full=TRUE)
#>   x rate        fx      dRate
#> 1 1    1 -1.000000  0.0000000
#> 2 1    2 -1.306853 -0.5000000
#> 3 1    3 -1.901388 -0.6666667