[Rcpp-devel] Is creating a DataFrame from std::vector-s supposed to work?

[Ivan Popivanov]

Two versions of the code, see at the end. The first converts my
std::vectors to Rcpp equivalents. The second builds the data frame from the
std::vectors.

Calling the function containing this code numerous times (hundreds if not
thousands) returning the std::vectors directly seems to cause random
crashes or hangs somewhere after the return statement. The other version
seems to work properly.

Thanks,

  return Rcpp::DataFrame::create(
               Rcpp::Named("Entry") = Rcpp::IntegerVector(ibeg.begin(),
ibeg.end()),
               Rcpp::Named("Exit") =
Rcpp::IntegerVector(iendOut.begin(),iendOut.end()),
               Rcpp::Named("Position") =
Rcpp::IntegerVector(position.begin(), position.end()),
               Rcpp::Named("StopLoss") =
Rcpp::NumericVector(stopLoss.begin(), stopLoss.end()),
               Rcpp::Named("StopTrailing") =
Rcpp::NumericVector(stopTrailing.begin(), stopTrailing.end()),
               Rcpp::Named("ProfitTarget") =
Rcpp::NumericVector(profitTarget.begin(), profitTarget.end()),
               Rcpp::Named("ExitPrice") =
Rcpp::NumericVector(exitPrice.begin(), exitPrice.end()),
               Rcpp::Named("Gain") = Rcpp::NumericVector(gain.begin(),
gain.end()),
               Rcpp::Named("MAE") = Rcpp::NumericVector(mae.begin(),
mae.end()),
               Rcpp::Named("MFE") = Rcpp::NumericVector(mfe.begin(),
mfe.end()),
               Rcpp::Named("Reason") = Rcpp::IntegerVector(reason.begin(),
reason.end()));
   /*
   return Rcpp::DataFrame::create(
               Rcpp::Named("Entry") = ibeg,
               Rcpp::Named("Exit") = iendOut,
               Rcpp::Named("Position") = position,
               Rcpp::Named("StopLoss") = stopLoss,
               Rcpp::Named("StopTrailing") = stopTrailing,
               Rcpp::Named("ProfitTarget") = profitTarget,
               Rcpp::Named("ExitPrice") = exitPrice,
               Rcpp::Named("Gain") = gain,
               Rcpp::Named("MAE") = mae,
               Rcpp::Named("MFE") = mfe,
               Rcpp::Named("Reason") = reason);
               */
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