Displaying 3 results from an estimated 3 matches for "kakulmodani".
2008 Apr 22
4
how to convert non numeric data into numeric?
I am having the following error in my function
function(theta,reqdIRR)
{
theta1<-theta[1]
theta2<-theta[2]
n<-length(reqdIRR)
constant<- n*(theta1+theta2)
sum1<-lapply(reqdIRR*exp(theta1),FUN = sum)
sum2<-lapply(exp(theta2 - reqdIRR*exp(theta1)),FUN = sum)
sum = sum1 + sum2
log.fcn = constant - as.numeric(sum)
result = - log.fcn
return(result)
}
*error :
2008 Apr 26
1
How to use the optim function if the length of the objective function is greater than 1?
Hi,
Please help me out with this.Im a new user of R.
Thanks
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2008 May 09
0
Log likelihood estimation using bivariate archimedean copula
Hi all,
I am trying to build a copula model using the Gumbel Copula and I have
two marginal distributions.I know the marginal parameters by using the
fitdistr() and optim().The problem is I dont know my copula parameter.
I am getting a bit confused of how shall I go about it.I read the
previous threads where the query was to estimate all the
parameters.How shall I define my log-likelihood