Amina and I continued the conversation off list, but for closure purposes,
the "multiple" version was tweaked a bit as there was comparison between
signed and unsigned ints which did not throw an error for me, but did for
Amina. Final multiple version posted below.
Thanks,
Avi
#include <RcppArmadillo.h>
using namespace Rcpp;
using namespace RcppArmadillo;
using namespace arma;
//[[Rcpp::depends(RcppArmadillo)]]
//[[Rcpp::export]]
vec Sample_Exp_Multi(size_t n, vec alpha, vec beta) {
size_t m = alpha.size();
vec answers(n);
uvec2 S;
for (size_t i = 0; i < n; ++i){
do {
S = randi<uvec>(2, distr_param(0, m - 1));
} while (S(0) == S(1));
answers(i) = exp(alpha(S(0)) + beta(S(1)));
}
return(answers);
}
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