Hi all,
Thanks for all the responses and for clarifying what big matrices are.
I had actually looked through the rcpp-devel site before attempting to use
big.matrix with Rcpp. I probably misunderstood this thread about
bigmemory; it sounded like bigmemory objects worked "out-of-the-box" with
Rcpp
On 15 March 2013 at 00:51, Romain Francois wrote:
| Why do you use wrap here ?
Reflex, because I returned an atomistic type.
| Wrap will create a SEXP, not a bool !
Quite right but was in a rush while doing other things too. "Forgot" that I
was using sourceCpp() which give one additional layer
Le 14 mars 2013 à 19:33, Dirk Eddelbuettel a écrit :
>
> On 14 March 2013 at 12:24, Smith, Dale wrote:
> | Write it up for Rcpp Gallery.
>
> Yup. Our thoughts too. Here is a slightly modified version which works as a
> single cpp file thanks to the wonders of sourceCpp() --- bigmemory header
On 14 March 2013 at 12:24, Smith, Dale wrote:
| Write it up for Rcpp Gallery.
Yup. Our thoughts too. Here is a slightly modified version which works as a
single cpp file thanks to the wonders of sourceCpp() --- bigmemory headers
are found automagically, and the example is executed too.
Dirk
Behalf Of Michael
Kane
Sent: Thursday, March 14, 2013 1:19 PM
To: Dirk Eddelbuettel
Cc: [email protected]
Subject: Re: [Rcpp-devel] Filling a big.matrix in Rcpp
OK, I've got it working.
You need to add the bigmemory inst directory to the PKG_CPPFLAGS,
include MatrixAc
OK, I've got it working.
You need to add the bigmemory inst directory to the PKG_CPPFLAGS, include
MatrixAccessor.hpp, and pass the pointer to the BigMatrix object to your
function. The following code should do the trick but note that it does not
create a new big.matrix object it simply modifies t
I do not think we have support for bigmemory's big.matrix objects. So you
can't just assum it works.
Contributions welcome. This is both 'an obvious one' as it would make sense
at the C++ and R levels, and something that should not be so hard as we
support XPtr.
Dirk
--
Dirk Eddelbuettel | e
Shradda,
A big.matrix is not a regular R matrix. It is a completely separate type.
The definition can be found in BigMatrix.h. I've rewritten your C++ code
but there is still a problem. To build the function the compiler needs to
know where the bigmemory header files are. Basically, you need to #i
