Re: [R] Estimation parameters of lognormal censored data

Salma, I don't know much about survival modelling, but many smart folks do, so I'm forwarding this back to R-help so it gets a wider audience. In fact, we generally like to keep replies "on list" 1) so that they are archived for future googlers; 2) so that you have access to a wider pool of respon

Re: [R] Estimation parameters of lognormal censored data

On Tue, Aug 28, 2012 at 9:58 PM, Salma Wafi wrote: > Hi, I am trying to get the maximum likelihood estimator for lognormal > distribution with censored data;when we have left, interval and right > censord. I built my code in R, by writing the deriving of log likelihood > function and using newt

[R] Estimation parameters of lognormal censored data

Hi, I am trying to get the maximum likelihood estimator for lognormal distribution with censored data;when we have left, interval and right censord. I built my code in R, by writing the deriving of log likelihood function and using newton raphson method but my estimators were too high " overest