Hi,
Just a quick comment on (1).
The C-Fortran interface has been standardized since Fortran 2003. However, it
does require the Fortran interface that is being called from C to have been
written with C operability in mind as specific C interoperable types etc. must
be used.
Trying to call a
blems at compile time than the C ones).
Martyn
-Original Message-
From: MAURICE Jean - externe [mailto:jean-externe.maur...@edf.fr]
Sent: 07 March 2016 15:46
To: Martyn Byng
Cc: r-devel@r-project.org
Subject: RE: ALLOCATE in a FORTRAN subroutine
Hi Martyn,
Many thanks for your answer.
Hi,
Until you get a more definitive answer, I will make an attempt to give some
advice.
When using an assumed sized array (i.e. REAL*8 array1(*)) you still need to
allocate the memory prior to calling the Fortran subroutine, so you would still
need to know its maximum length.
Arrays created i
Hi,
You are going to have to track down exactly where the NaN is being
produced. These usually occur due to performing invalid numerical
operations, like trying to take the square-root of a negative number,
trying to calculate 0/0 etc.
Try adding a series of if / then blocks prior to performing a
have specified I only checked on Windows. So: On Windows 7
> 64bit, the R-32bit works fine, the R-64bit gives the behaviour Martyn
> reported.
>
> Cheers
> Joris
>
> On Mon, Nov 21, 2011 at 3:58 PM, Brian G. Peterson
wrote:
>> On Mon, 2011-11-21 at 14:41 +, Martyn Byng w
Hi,
I'm getting some strange behaviour when trying to use the power operator
(a^b) when a is large and b is less than one:
big <- .Machine$double.xmax
big
big^0.5
sqrt(big)
> big <- 1.797693134862315708384e+308
> big^0.5
[1] Inf
> sqrt(big)
[1] 1.340781e+154
I'm guessing that this behaviour is
Hi,
Even using the same math libraries you can get different results,
depending on what sorts of instructions those libraries use, see the
following (none R related) blog article:
http://blog.nag.com/2011/02/wandering-precision.html.
Martyn
-Original Message-
From: r-devel-boun...@r-proj
-project.org]
Sent: 20 May 2011 20:17
To: Martyn Byng
Cc: r-devel@r-project.org
Subject: Re: [Rd] Calling Rscript from Makevars
On May 20, 2011, at 12:04 PM, Martyn Byng wrote:
> Hi,
>
> I am trying to package some code to use with R and wanted to call
> Rscript from within the Makevar
Hi,
I am trying to package some code to use with R and wanted to call
Rscript from within the Makevars file (I am trying to automate the
setting of the location of a third party library depending on what is
available / the system the package is being installed on).
If I just have a simple Makevar
