Displaying 1 result from an estimated 1 matches for "optimiere".
2006 Feb 08
1
Simple optim - question
Hello,
I want to find the parameters mu and sigma that minimize the following
function.
It's important, that mu and sigma are strictly positive.
-----------------
optimiere = function(fmean,smean,d,x,mu,sigma)
{
merk = c()
for (i in 1:length(d))
merk=c(merk,1/(d[i]^2)*(d[i]-1/(fmean*(1-plnorm(x[i],mu,sigma))))^2)
return(sum(merk))
}
-----------------
To do that I'm using the nlm function, but I only get results for ONE of the
two parameters.
I cannot cope with...