[Rd] Stata support in package foreign

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Jan 23 15:36:50 CET 2014

On 23/01/2014 08:21, Prof Brian Ripley wrote:
> As you know, Stata support in 'foreign' was frozen a while back at Stata
> version 12. R-core has received a request from a grad student to 'give
> top priority' to supporting Stata 13.  That is not going to happen, not
> least because none of us has access to Stata.
> However, according to Stata's documentation both Stata 12 and 13 use
> format 115, so foreign::read.dta should be able to read Stata 13 files.
>   It would be helpful to know if that is the case.
> Second, Stata document reading R's POSIXct date-times into Stata at
> http://www.stata.com/manuals13/ddatetime.pdf page 10 using format %tC.
> The description there of 'UTC-adusted seconds' is ambiguous, but what is
> said on page 2 suggests %tc is correct.  Could someone please try
> reading a recent R date-time into Stata (one since July 2012, the last
> leap second) and see which format reads it correctly.
> Finally, PR#15517 is about undocumented details of a change in the way
> Stata saves dates.  It would be helpful if someone could send me two
> example Stata 12/13 files, one containing a column of dates and one
> containing a column of date-times together with a printout of what Stata
> interprets them as.

Thanks to George Vega Yon I have the Stata 12 files I need.

> Thanks for any help,

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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