[Rcpp-devel] Inf to NA.

  Le mar 21/12/10 17:24, "Cedric Ginestet" c.ginestet05 at googlemail.com a ?crit:

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
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London
SE5 8AF
Tel: (+44) 20-3228-3052
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Email: cedric.ginestet at kcl.ac.uk