Nothing
pgfDlogarithmicpoisson <-
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)<2) stop("At least one value in params is missing")
if (length(params)>2) stop("The length of params is 2")
theta<-params[1]
lambda<-params[2]
if ((theta>=1)|(theta<=0))
stop ("Parameter theta belongs to the interval (0,1)")
if (lambda<=0)
stop ("Parameter lambda must be positive")
-lambda*(1-theta)/log(theta)*exp(lambda*(s-1))/(1-(1-theta)*exp(lambda*(s-1)))
}
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