Statistical Methods and Software for the Analysis of Occupational Exposure Data With Non-Detectable Values

Edward L. Frome and Paul F. Wambach
ORNL Technical Report "Statistical Methods and Software for the
Analysis of Occupational Exposure Data With Non-Detectable Values",
ORNL/TM-2005/52 is available here in PDF format
Abridged Version (Abstract,Introduction,Applications and Appendix) is available here in HTML format

R is a language and environment for statistical computing and graphics. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows, and MacOS. R is available as Free Software under the terms of the Free Software Foundation's GNU General Public License in source code form and as binaries.

Visit the R Homepage and read What is R?( see Menu on left) and the FAQs under Documentation. For on line documentation go to the R Homepage and Select [Manuals] on left hand menu and then see Item 1 An Introduction to R and click on [browse HTML].

The "informal" R functions in Step 2 below have been replaced with the R packages "Statistical Analysis of Non-detect Data"(sand). The sand package is available at the statoed website CLICK HERE Please visit this new website for instructions on how to obtain and install R and the sand package and to obtain the data sets in Stps 3-5 below..

The following instructions explain how to obtain the Windows (95 or later) version of R and how to download the R functions and data described in ORNL/TM-2005/52.

  1. If you have R installed and have an R-icon on your desktop go to the next step.
    If you do not have R installed click here for instructions.

  2. To download the R functions from oedmain.R , oedutil.R and the example data sets: CLICK HERE. See online help files and documentation for the sand package.

  3. To Run R and Read in Functions and Data Sets in ORNL/TM-2005/52 CLICK HERE. These data sets are now available in the sand package.

  4. To read and analyze data from Example 1 Smelter Elevated Surface Data CLICK HERE. See sand package help file for SESdata.

  5. For an example of how to read and analyze multiple data sets from an Excel Spread Sheet CLICK HERE See sand package help file for R function readss() in sand package.

IMPORTANT: This is Revision 3 of AOED Web Site (29Jun05).
Changes or revisions to material at this web site are indicated Here. Please see Notes 1 and 2 if you down loaded the R functions BEFORE 29 June 2005 from the FINAL DRAFT version of this web site at

Developed For U. S. DOE, Office of Health (EH-5)
Last Modified 2 May 2007 by (touches: [an error occurred while processing this directive] )
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