Add method for purify with existing grid

Author: jyliuu

src/randomPlantedForest.cpp

@@ -20,6 +20,7 @@ RCPP_MODULE(mod_rpf)
       .method("purify_anova", &RandomPlantedForest::purify_anova)
       .method("purify_anova_and_marginalize", &RandomPlantedForest::purify_anova_and_marginalize)
       .method("purify_no_extrapolation", &RandomPlantedForest::purify_no_extrapolation)
+      .method("purify_no_extrapolation_existing_grid", &RandomPlantedForest::purify_no_extrapolation_existing_grid)
       .method("print", &RandomPlantedForest::print)
       .method("get_parameters", &RandomPlantedForest::get_parameters)
       .method("set_parameters", &RandomPlantedForest::set_parameters)