[Rcpp-devel] Inf to NA.

[romain at r-enthusiasts.com]

 Le mar 21/12/10 17:24, "Cedric Ginestet" c.ginestet05 at googlemail.com a écrit:
> Dear Rcpp experts, 
> 
> When passing a vector/argument with infinite values to a C++
> function, the R wrapper returns NA's. [See the code below] Is there a
> way around this to ensure that infinite values are preserved from R to
> C++ and then from C++ to R again? 

There is no such thing as an infinite value for integers in R. 

> as.integer(Inf)
[1] NA
Message d'avis :
NAs introduits lors de la conversion automatique

The D matrix you build is a numeric matrix, when you use the IntegerMatrix constructor, there is coercion to an integer matrix. 

Hope this helps, 

Romain

> ######################################
> D  src3  IntegerMatrix xD(D);
> IntegerVector Drow(xD.ncol()); 
> for(int i=0; i return xD;
> '
> rowExtraction  cxxfunction(signature(D="matrix"),body=src3,plugin="Rcpp",verbose=TRUE)
> rowExtraction(D)
> ######################################
> 
> Thank you very much, 
> Cedric 
> 
> -- 
> Cedric Ginestet 
> Centre for Neuroimaging Sciences (L3.04) 
> NIHR Biomedical Research Centre 
> Department of Neuroimaging 
> Institute of Psychiatry, Box P089 
> King's College London 
> De Crespigny Park
> London 
> SE5 8AF 
> Tel: (+44) 20-3228-3052
> Fax: (+44) 20-3228-2116
> Email: cedric.ginestet at kcl.ac.uk
> 
> 
>