[R] fitting lognormal censored data

[Rich Shepard]

On Thu, 30 Aug 2012, Salma Wafi wrote:

> I am trying to get some estimator based on lognormal distribution when we
> have left,interval, and right censored data.

   Take a look at the NADA package. For left-censored data you can use cenmle
with dist = 'lognormal'. Survival analyses work well for right-censored data
as well as interval-censored data.

   Dennis Helsel's second edition, "Statistics for Censored Environmental Data
Unsing Minitab and R" is the basis for NADA and a valuable resource.

Rich