That was great! I tried as what you said, not as many warnings as before,
and it seems that it converges.
Thank you Berend. and thank you all!
Carol
On Sat, May 8, 2010 at 5:00 PM, Berend Hasselman wrote:
>
>
> Carol Gao wrote:
> >
> > I have generated some random variable from generalised gam
Carol Gao wrote:
>
> I have generated some random variable from generalised gamma distribution,
> and now I need to use them to test on my optim function. Please see below:
>
> *##Need to install package VGAM first before calling rggamma function
> library(VGAM)
> x <- rggamma(500,scale=gamma(1
f Carol Gao
> Sent: Friday, May 07, 2010 5:53 AM
> To: R-help@r-project.org
> Subject: [R] problem in using optim
>
> Dear R users,
>
> When I was trying to use the function *optim* to get the MLEs, quite a few
> warning messages showed up as below:
>
> Warning in l
Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Carol Gao
Sent: Friday, May 07, 2010 5:53 AM
To: R-help@r-project.org
Subject: [R] problem in using optim
Dear R users,
When I was trying to use the function *optim* to get the MLEs, quite a few
just check whether some values in the parameter space forcing the log()
function to apply logarithm on negative values !!!
--
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__
Dear R users,
When I was trying to use the function *optim* to get the MLEs, quite a few
warning messages showed up as below:
Warning in log(psi * lam) : NaNs produced
I am just wondering what does this mean? Was it something wrong with my
likelihood function or was it sth wrong with the data?
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