R/pgfDpoissonlindley.R

In Compounding: Computing Continuous Distributions

pgfDpoissonlindley <-
function(s,params) {
k<-s[abs(s)>1]


if (length(k)>0)

warning("At least one element of the vector s are out of interval [-1,1]")

if (length(params)>1) stop("The length of params is 1")

    theta<-params[1]
if (theta<=0)
stop ("Parameter lambda must be positive")
    (2/(theta+1-s)-1/(theta+2-s))*pgfpoissonlindley(s,params)
}