On 9 December 2012 at 14:56, Romain Francois wrote:
| Thanks for the valuable information.
|
| I will look into it more seriously at some point when I have some more
| time.
I have a minor improvement now, based on poking around in SpMat_meat.hpp and
the previous discussion, particularly Conrad
Thanks for the valuable information.
I will look into it more seriously at some point when I have some more
time.
Romain
Le 09/12/12 14:40, c s a écrit :
Hi Romain & Doug,
Two points to note:
(1)
When poking around internal Armadillo pointers and arrays for sparse
matrices, please take int
Hi Romain & Doug,
Two points to note:
(1)
When poking around internal Armadillo pointers and arrays for sparse
matrices, please take into account that the col_ptrs array is slightly
longer than specified by the Compressed Sparse Column (CSC) format.
However, this should not cause any problems wh
Le 08/12/12 19:54, Douglas Bates a écrit :
On Sat, Dec 8, 2012 at 10:35 AM, c s mailto:conradsand.a...@gmail.com>> wrote:
Armadillo sparse matrices are stored in Compressed Sparse Column format:
http://en.wikipedia.org/wiki/Sparse_matrix#Compressed_sparse_column_.28CSC_or_CCS.29
T
On Sat, Dec 8, 2012 at 10:35 AM, c s wrote:
> Armadillo sparse matrices are stored in Compressed Sparse Column format:
>
>
> http://en.wikipedia.org/wiki/Sparse_matrix#Compressed_sparse_column_.28CSC_or_CCS.29
>
> This layout is used by a majority of external solvers.
>
> It would be far more eff
Ah. One thing I could do is leverage this:
#ifdef ARMA_EXTRA_SPMAT_PROTO
#include ARMA_INCFILE_WRAP(ARMA_EXTRA_SPMAT_PROTO)
#endif
Not sure how yet.
Le 08/12/12 19:17, Romain Francois a écrit :
That looks very similar, if not identical to what dgCMatrix uses. Can
you direct me to a construct
That looks very similar, if not identical to what dgCMatrix uses. Can
you direct me to a constructor where I could feed such information ?
Romain
Le 08/12/12 17:35, c s a écrit :
Armadillo sparse matrices are stored in Compressed Sparse Column format:
http://en.wikipedia.org/wiki/Sparse_matri
Armadillo sparse matrices are stored in Compressed Sparse Column format:
http://en.wikipedia.org/wiki/Sparse_matrix#Compressed_sparse_column_.28CSC_or_CCS.29
This layout is used by a majority of external solvers.
It would be far more efficient to take this layout into account when
copying matric
Le 08/12/12 09:45, Søren Højsgaard a écrit :
Dear all,
I want to use a matrix (of type "dgCMatrix" from the Matrix package) in
RcppArmadillo, so I do:
library(inline)
src <- '
using namespace arma;
using namespace Rcpp;
SpMat X = as >(XX_);
'
foo <- cxxfunction(signature(XX_=""), body=src, plu
Hi Søren,
On 8 December 2012 at 08:45, Søren Højsgaard wrote:
| I want to use a matrix (of type "dgCMatrix" from the Matrix package) in
RcppArmadillo, so I do:
|
| library(inline)
| src <- '
| using namespace arma;
| using namespace Rcpp;
| SpMat X = as >(XX_);
| '
| foo <- cxxfunction(signatur
Dear all,
I want to use a matrix (of type "dgCMatrix" from the Matrix package) in
RcppArmadillo, so I do:
library(inline)
src <- '
using namespace arma;
using namespace Rcpp;
SpMat X = as >(XX_);
'
foo <- cxxfunction(signature(XX_=""), body=src, plugin="RcppArmadillo")
- but this fails. It seem
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