Nothing
pgfIpascalpoisson <-
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)<3) stop("At least one value in params is missing")
if (length(params)>3) stop("The length of params is 3")
theta<-params[1]
mu<-params[2]
a<-params[3]
if (theta<=0)
stop ("Parameter theta must be positive")
if (mu<=0)
stop ("Parameter mu must be positive")
if (a<=0)
stop ("Parameter a must be positive")
zval<-1+mu/(a*theta)-s^(-1/a)
1+log(a*theta*zval/mu)/theta
}
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