[R] Estimation parameters of lognormal censored data

[R. Michael Weylandt]

On Tue, Aug 28, 2012 at 9:58 PM, Salma Wafi <salmawafi76 at yahoo.com> 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 newton raphson method  but my estimators were too high " overestimation", where the values exceed the 1000 in  some runing of my code.
> is there any one can tell me where the error can be and help me in how I can get the estimators with right way?.
>  kind regards

This sounds like a rather complicated calculation and would be much
easier to follow along with if you could provide a reproducible
example: this site provides many useful pointers.

http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

Cheers,
Michael


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