[Rcpp-devel] Integer matrices in Rcpp and Armadillo

[Romain Francois]

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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