R help - Oct 2005 - Uncensoring a dataset - resent

Does anyone know of an R package that I can use to uncensor a normal or
log-normal dataset?  I'm particularly interested in the MLE method of
Cohen (1959), "Simplified estimators for the normal distribution when
samples are single censored or truncated," Technometrics, 1(3), 217-237.
Of course, if there is anything better, I'd be glad to hear about that
too.


Thanks.

Rick

On Fri, 28 Oct 2005, Richard Reiss wrote:
>
> Does anyone know of an R package that I can use to uncensor a normal or
> log-normal dataset?  I'm particularly interested in the MLE method of
> Cohen (1959), "Simplified estimators for the normal distribution when
> samples are single censored or truncated," Technometrics, 1(3),
217-237.
> Of course, if there is anything better, I'd be glad to hear about that
> too.
>
survreg() in the survival package will fit censored normal and censored 
lognormal models.  If you fit a model with only an intercept this will 
estimate the mean and variance.

 	-thomas

Although it doesn't implement the MLE, if you are looking at 
environmental data, I'd suggest looking at the R package NADA 
(available from CRAN). You could also contact Ed Frome at 
FromeEL at ornl.gov (http://www.csm.ornl.gov/~frome/index.html), and ask 
about his R functions for this -- not packaged, though.

-Don

At 10:41 AM -0400 10/28/05, Richard Reiss wrote:
>Does anyone know of an R package that I can use to uncensor a normal or
>log-normal dataset?  I'm particularly interested in the MLE method of
>Cohen (1959), "Simplified estimators for the normal distribution when
>samples are single censored or truncated," Technometrics, 1(3),
217-237.
>Of course, if there is anything better, I'd be glad to hear about that
>too.
>
>
>Thanks.
>
>Rick
>
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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA