[Rcpp-devel] Integer matrices in Rcpp and Armadillo

[Simon Zehnder]

Hi Romain,

oh thanks! I haven't recognized this one, even though I use armadillo now for more than a half year ;)



best

Simon

On Jun 6, 2013, at 6:48 PM, Romain Francois <romain at r-enthusiasts.com> wrote:

> Le 06/06/13 18:38, Simon Zehnder a écrit :
>> Hi Dirk,
>> 
>> thanks for the fast reply. It seems, that using ints is the only possibility here. I understand though, that the arma::umat has type 'unsigned int', hasn't it? So in this case I wouldn't be able to use umat, but rather mat<int>, right?
> 
> Which is arma::imat
> 
> See http://arma.sourceforge.net/docs.html#Mat
> 
>> Best
>> 
>> Simon
>> 
>> 
>> On Jun 6, 2013, at 6:32 PM, Dirk Eddelbuettel <edd at debian.org> wrote:
>> 
>>> 
>>> On 6 June 2013 at 18:03, Simon Zehnder wrote:
>>> | What I need is an arma::umat in C++ and if possible in addition an integer array in R. Is this possible?
>>> 
>>> R itself has no unsigned integers (just as it has no [signed or unsigned] short or long integeger).
>>> 
>>> You should be able to write wrappers though, but this MUST entail copies for
>>> that very reason.  So maybe stick to ints?
>>> 
>>> Dirk
> 
> 
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