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Hi rcpp-devel,
How can I test if a member of a list is a NULL value ? I have this kind of R code # create a list with all the parameters for initializing the algorithms `initAlgo`<-function( algo="EM" , init= NULL , nbTry= NULL ) { listOptions <- list( algo= algo, init= init, nbTry= nbTry ) listOptions } # call c/C++ res_cluster <- .Call("MyFunction", data, options = initAlgo()) and this kind of C/C++ code cppExport SEXP MyFunction( SEXP data, SEXP algoOptions) { BEGIN_RCPP // wrap data in Rcpp matrix Rcpp::NumericMatrix RData(data); // creates Rcpp matrix from SEXP // wrap list algoOptions Rcpp::List RalgoOptions(algoOptions); .......... } I would like to test if the init and nbTry parameter in the RalgoOptions are NULL and I don't find any documentation about the way to do it. Thanks Serge Iovleff -- USTL - IUT "A" - 3A56 | Tel: (33) 3 59 63 22 20 Département Informatique | Fax: (33) 3 59 63 22 22 BP 90179 | www.iut-info.univ-lille1.fr/~iovleff 59653 Villeneuve d'Ascq | [email protected] |
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