rcpparmadillo - Subsetting a List in Rcpp Armadillo

Question

I'm very new to Rcpp. So I may ask a simple question. I want to subset a List. A similar R code is a[idx]. In Rcpp, I tried a(idx) but there was an error. Does any one know how to do the subsetting to a List in Rcpp? Thanks very much!

This is the Rcpp function with error "no matching function for call to object of type 'Rcpp::List'"

List Subset(vec x, double s, List a){
    uvec idx = find(x == s); // the index which I want to keep
    List tmp = a(idx); 
    return(tmp);
}

question from:https://stackoverflow.com/questions/65910133/subsetting-a-list-in-rcpp-armadillo

Answer 1

Waitting for answers