A question, please about development of R packages:

Are there any guidelines or best practices for deciding when and why to
implement an operation in R, vs. implementing it in C?  The "Writing R
Extensions" recommends "working in interpreted R code . . . this is normally
the best option."  But we do write C-functions and access them in R - the
question is, when/why is this justified, and when/why is it NOT justified?

While I have identified helpful documents on R coding standards, I have not
seen notes/discussions on when/why to implement in R, vs. when to implement
in C.

Thanks, Patrick

On Sun, Jan 16, 2011 at 3:00 AM, <r-devel-request@r-project.org> wrote:

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> Today's Topics:
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>   1. RPostgreSQL 0.1.7 for Windows 64 causes R.2.12.1 Win64 crash
>      (Xiaobo Gu)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 15 Jan 2011 10:34:55 +0800
> From: Xiaobo Gu <guxiaobo1982@gmail.com>
> To: r-devel@r-project.org
> Subject: [Rd] RPostgreSQL 0.1.7 for Windows 64 causes R.2.12.1 Win64
>        crash
> Message-ID:
>        <AANLkTinvoub-z_Le1GVPYswnqTsW1P6MZzLZsztois9K@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi,
> I build the binary package file of RPostgreSQL 0.1.7 for Windows 2003
> Server R2 64 bit SP2, the software environments are as following:
>         R 2.12.1 for Win64
>         RTools212 for Win64
>         DBI 0.2.5
>         RPostgreSQL 0.1.7
>         Postgresql related binaries shipped with
> postgresql-9.0.2-1-windows_x64.exe from EnterpriseDB
>
> The package can be loaded, and driver can be created, but the
> dbConnect function causes the whole RGui crashes,
>
> driver <- dbDriver("PostgreSQL")
> con <- dbConnect(driver, dbname="demo", host="192.168.8.1",
> user="postgres", password="postgres", port=5432)
>
>
>
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> End of R-devel Digest, Vol 95, Issue 14
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