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Re: R package useful for electronic regulatory submissions

From: Leonid Gibiansky <LGibiansky>
Date: Fri, 26 Oct 2007 13:52:14 -0400

Hi Gregory, Tim,

I am not sure whether this is a bug, feature or my error, but I created
the data frame Data and used write.xport function of the SASxport
package as follows:


When I open the resulting file using the SAS Viewer 9 (or when I read it
back to R using read.xport) I see that all negative values were saved

Since these files are needed for regulatory submission, it looks
dangerous, so if anybody already used the package, check whether
write.xport - read.xport combination returns the original data.


Leonid Gibiansky, Ph.D.
President, QuantPharm LLC
e-mail: LGibiansky at
tel: (301) 767 5566

Tim Bergsma wrote:
> Metrum Institute and Random Technologies LLC are pleased to announce the
> availability of the SASxport package for the R programming language.
> Development of SASxport was motivated by a desire to interconvert R and
> SAS TRANSPORT (‘xport’) formats for NMTRAN data sets. In particular, the
> ability to write ‘xport’ files from within R helps achieve consistency
> with regulatory guidelines on electronic submissions.
> The new SASxport package provides the ability to directly read, list,
> and write SAS ‘xport’ files, including proper handling of custom SAS
> formats. (This extends existing functionality for reading and listing
> SAS transport files provided by the foreign package.)
> The SASxport package is freely available from CRAN:
> Additional distribution options and technical support are available from
> Random Technologies, LLC:
> For more information, please visit the web site or contact:
> * USA & Canada Toll Free: (877) 813-3266
> * Outside the USA & Canada: (585) 419-6853
> * Email: <support
> Funding for this project was provided by Metrum Institute
> (
> Regards,
> Gregory R. Warnes, Ph.D
> Chief Scientist
> Random Technologies LLC
> Timothy Bergsma, Ph.D.
> Research Scientist
> Metrum Institute
Received on Fri Oct 26 2007 - 13:52:14 EDT

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