Hello,
We don't know your function f, so this is hard to say. Anyway, this
below implements something similar to apply(.,1,paste0) in rcpp (current
devl version):
#include
using namespace Rcpp ;
// [[Rcpp::export]]
CharacterVector pasteColumns(CharacterMatrix m){
String buffer ;
in
Thanks very much, Dirk and Steve.
Always slightly fear-inducing when someone starts their reply with "Ah, the joy
of working with X" :) I'll have a go at implementing your suggestion on my two
examples, Dirk.
I think learning more about Rcpp will become my Christmas-holiday project. It's
alr
Hi,
On Mon, Dec 10, 2012 at 5:43 PM, wrote:
> I preface this by stating that I'm very much a Rcpp beginner who is
> comfortable in R but I've never before used C++. I'm working through the
> Rcpp documentation but haven't been able to answer my question.
>
> I've written an Rcpp (v0.10.1) functi
Hi Pete,
On 11 December 2012 at 09:43, hic...@wehi.edu.au wrote:
| I preface this by stating that I'm very much a Rcpp beginner who is
comfortable
| in R but I've never before used C++. I'm working through the Rcpp
documentation
| but haven't been able to answer my question.
|
| I've written a
I preface this by stating that I'm very much a Rcpp beginner who is comfortable
in R but I've never before used C++. I'm working through the Rcpp documentation
but haven't been able to answer my question.
I've written an Rcpp (v0.10.1) function f that takes as input a CharacterMatrix
X. X has 2
On Mon, 10 Dec 2012 17:06:06 +0100,Romain Francois
wrote:
> the .col method gives you a subview_col :
>arma_inline subview_col col(const uword col_num);
>arma_inline const subview_col col(const uword col_num) const;
> not an umat.
> The name of the class implies that it is a "
On 10 December 2012 at 10:45, Douglas Bates wrote:
| On Mon, Dec 10, 2012 at 10:38 AM, Romain Francois
| wrote:
|
| Le 10/12/12 17:29, Douglas Bates a écrit :
|
| or does it matter?
|
|
| A[i,j] is wrong, not valid C or C++ code. so there is only one choice.
No, it's worse, I
Le 10/12/12 17:45, Douglas Bates a écrit :
On Mon, Dec 10, 2012 at 10:38 AM, Romain Francois
mailto:rom...@r-enthusiasts.com>> wrote:
Le 10/12/12 17:29, Douglas Bates a écrit :
or does it matter?
A[i,j] is wrong, not valid C or C++ code. so there is only one choice.
Indeed.
On Mon, Dec 10, 2012 at 10:38 AM, Romain Francois
wrote:
> Le 10/12/12 17:29, Douglas Bates a écrit :
>
>> or does it matter?
>>
>
> A[i,j] is wrong, not valid C or C++ code. so there is only one choice.
>
Indeed. Thanks. Somehow I managed to convince myself that I had used
A[i,j] at some point
or does it matter?
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Le 10/12/12 17:06, Romain Francois a écrit :
the .col method gives you a subview_col :
arma_inline subview_col col(const uword col_num);
arma_inline const subview_col col(const uword col_num) const;
not an umat.
The name of the class implies that it is a "view" class, so a way to
l
the .col method gives you a subview_col :
arma_inline subview_col col(const uword col_num);
arma_inline const subview_col col(const uword col_num) const;
not an umat.
The name of the class implies that it is a "view" class, so a way to
look a data from another class. hence, no data o
Dear All,
I am trying to pass columns from an Armadillo matrix to a function, but
I'd like to pass just a reference to the column, not a copy of the column
and I do not seem to be able to do it "elegantly".
The code below (function f1) I think shows that passing X.col to a
function creates a co
Hi Conrad,
Thanks a lot. Understood; I'll stay away from premature optimization,
then, and see if it is really needed.
Best,
R.
On Mon, 10 Dec 2012 23:48:36 +1000,c s wrote:
> Hi Ramon,
> Option (b) would be more efficient, at the expense of slightly more code.
> However, you can use opti
Hi Ramon,
Option (b) would be more efficient, at the expense of slightly more code.
However, you can use option (a) to quickly get something working. Once you
test that your code works okay, you can always optimise it by selectively
refactoring it into (b).
If the code in question is not inside
Hi Honglang,
I recommend looking into using the solve() function in Armadillo, instead
of inv(). Using solve() will be considerably faster.
More details here:
http://arma.sourceforge.net/docs.html#solve
On Thursday, December 6, 2012, Honglang Wang
wrote:
> The following is a full example altho
Dear All,
I am using RcppArmadillo, and I am creating matrices in the C++ code
(i.e., these are not matrices passed from R). The sizes of these matrices
might need to increase dynamically during run time, with elements being
added at the end. What is the recommended way of doing this:
a) Just i
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