[OGRUG] R-UG-Ottawa Digest, Vol 41, Issue 1

[Ian E. Gorman]

The list of URLs given by Glen Newton is a pretty good guide to what is 
needed to convert from SAS to R.

In particular:
- conversion would be incremental, application by application, and some 
applications might not be worth converting
- a lot of non-automated work is required

Based on my own experience with large-scale conversion projects that did 
NOT require a major change of implementation language, I think the first 
URL (SAS to R Migration https://www.r-bloggers.com/sas-to-r-migration/) 
gives a very good summary of what a big conversion project would look like.

Conversion between SAS data sets and R data frames should be 
straightforward and it might be possible to fully automate the conversions.

None of the URLs mention the value of tools for working with large 
numbers of text and code files
- Unix command-line utilities (built into Linux and easily available for 
Mac OS X and Windows 10
- A third-party file manager (such as ZTreeWin in Windows and Midnight 
Commander in Mac OS X or Linux).
These tools greatly reduce the cost of non-automated work and greatly 
increase the reproducibility and auditability of the work.



On 2017-02-15 06:00, r-ug-ottawa-request at r-project.org wrote:
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>    1. Fwd: [OTT-GOSLING] SAS to R migration (Joseph Potvin)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Tue, 14 Feb 2017 11:23:57 -0500
> From: Joseph Potvin <jpotvin at opman.ca>
> To: "r-ug-ottawa at r-project.org" <r-ug-ottawa at r-project.org>
> Subject: [OGRUG] Fwd: [OTT-GOSLING] SAS to R migration
> Message-ID:
> 	<CAKcXiSpFaFr8ertHKt+k8jw=Suazw4Xsf8=0z70W=WatCVqZkA at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
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> (Is this list still operational?)
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> Forwarding a question from a fellow at a certain science-based federal dept.
>
> Joseph Potvin
>
> ---------- Forwarded message ----------
> From: Glen Newton <glen.newton at gmail.com>
> Date: Tue, Feb 14, 2017 at 11:16 AM
> Subject: [OTT-GOSLING] SAS to R migration
> To: GOSLING members in Ottawa <ottawa-gosling at list.goslingcommunity.org>
>
>
> Does anyone on this list know of an example of any GoC or western
> government organization migrating their users/base from SAS to R?
>
> More specifically, when the organization was a science-based organization
> and the majority of the users being on the science side of things?
>
> Just a theoretical question of course...
>
> I found some useful resources but no concrete examples as per above:
> - SAS to R Migration https://www.r-bloggers.com/sas-to-r-migration/
> - A Saga Of Migrating From SAS To R
> http://www.mbtmag.com/article/2015/03/saga-migrating-sas-r
> - Helping Your Organization Migrate to R
> http://r4stats.com/2015/03/16/migrating-to-r/
> - SAS to R Migration - LondonR http://www.londonr.org/download/?id=87
>
> I am particularly interested where perhaps 90% of the use cases were
> addressed by R, and perhaps 10% still had to be in SAS, but at least
> reducing the SAS costs by 90%......
>
> Thanks,
> Glen
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-- 
______________________________________________________________________________
Ian Earl Gorman | http://www.gorman.ca/ |
http://gxparse.sourceforge.net | http://www.linkedin.com/in/iegorman