Continuing to talk to myself here...
* On 2008-09-17 at 21:06 -0700 Seth Falcon wrote:
> *argh* I'm certain this was working for me and yet when I try to
> reproduce in a new R shell it errors out.
This looks like an infelicity in the methods caching.
To make it work:
library("RSQLite")
* On 2008-09-17 at 19:25 -0700 Seth Falcon wrote:
> In the latest R-devel code (svn r46542), this behaves differently (and
> works as you were hoping). I get:
>
> library("RSQLite")
> setClass("SQLConPlus", contains=c("SQLiteConnection","integer"))
> dd = data.frame(a=1:3, b=letters[1
A couple more comments...
* On 2008-09-15 at 10:07 -0700 Seth Falcon wrote:
> > The example is with RSQLite but the same thing happens with
> > RMySQL, and other DBI packages.
The use of as() within the various DBI packages should be
re-evaluated. I suspect some of that code was among the first
Thanks, everyone, for the responses. That's exactly what I was after.
Regards,
Phil
> -Original Message-
> From: Jeff Ryan [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, September 17, 2008 4:19 PM
> To: Lee, Philip (IT)
> Cc: r-devel@r-project.org
> Subject: Re: [Rd] Dates in C api
>
>
If you are looking for examples of handling dates/times (specifically
POSIXct) within C code, the dev branch of xts has quite a bit of code
now.
http://r-forge.r-project.org/plugins/scmsvn/viewcvs.php/dev/pkg/src/?root=xts
Assigning the class (or any attribute) within the C code will be much
fast
On 9/17/2008 1:24 PM, Lee, Philip (IT) wrote:
r-devel,
I've been trying to write a C plugin for R, and I'm struggling to
understand how dates are represented.
I can create a date in R:
mydate<-as.Date(1, origin="1900-01-01") mydate
[1] "1900-01-02"
See ?Date for the internal represention: i
Dates are number of days since 1970-01-01 that is it.
to get data of Date in C:
library(inline)
code = 'Rprintf("%f", REAL(x)[0]); return R_NilValue;'
f = cfunction(signature(x="double"), body=code)
na = f(Sys.date())
to create an object of class Date:
--- in C ---
SEXP res = allocVector(REALSX
r-devel,
I've been trying to write a C plugin for R, and I'm struggling to
understand how dates are represented.
I can create a date in R:
> mydate<-as.Date(1, origin="1900-01-01") mydate
[1] "1900-01-02"
When I pass my date to a plugin, though, it's type is that of a real.
There doesn't seem to
