Message-ID: <alpine.LNX.2.00.1208130830230.21324@salmo.appl-ecosys.com>
Date: 2012-08-13T15:32:28Z
From: Rich Shepard
Subject: Imputing data below detection limit
In-Reply-To: <CACk-te3LaZ56OagJu+0FK5HVFUn+YHnX-OoAOSR0WqijVmAj1Q@mail.gmail.com>
On Mon, 13 Aug 2012, Bert Gunter wrote:
> The proper approach is to use the proper approach: model it as
> left-censored data. The problem with that is:
>>> I'm trying to impute data below detection limit (with multiple detection
>>> limits) so i need just a method or a code for imputation and then
>>> extract the complete dataset to do the analyses. Is there any package
>>> which could do that simply as i'm a beginner in R
This is the purpose of the NADA package. The package is based on Dennis
Helsel's "Statistics for Censored Environmental Data Using Minitab and R,
Second Edition."
Rich