222   C3FnTrainData& ftd = levApproxIter->second;  in build()  local
223   ftd.free_all();  in build()
304   ftd.function_train(ft);  in build()
662   C3FnTrainData& ftd = levApproxIter->second;  in compute_all_sobol_indices()  local
663   C3SobolSensitivity* fts = ftd.sobol();  in compute_all_sobol_indices()
665   fts = c3_sobol_sensitivity_calculate(ftd.function_train(), interaction_order);  in compute_all_sobol_indices()
666   ftd.sobol(fts);  in compute_all_sobol_indices()
671 compute_derived_statistics(C3FnTrainData& ftd, size_t num_mom, bool overwrite)  in compute_derived_statistics()  argument
676     ftd.ft_derived_functions_free();  in compute_derived_statistics()
677     ftd.ft_derived_functions_create(data_rep->multiApproxOpts, num_mom,  in compute_derived_statistics()
680   else if (ftd.derived_functions().allocated < num_mom) // incremental update  in compute_derived_statistics()
681     ftd.ft_derived_functions_create(data_rep->multiApproxOpts, num_mom,  in compute_derived_statistics()
687 compute_derived_statistics_av(C3FnTrainData& ftd, size_t num_mom,  in compute_derived_statistics_av()  argument
693   if (overwrite || ftd.derived_functions().allocated < num_mom) {  in compute_derived_statistics_av()
694     ftd.ft_derived_functions_free();  in compute_derived_statistics_av()
695     ftd.ft_derived_functions_create_av(data_rep->multiApproxOpts,  in compute_derived_statistics_av()
743 Real C3Approximation::mean(C3FnTrainData& ftd)//, size_t num_mom)  in mean()  argument
745   compute_derived_statistics(ftd, 2);//num_mom); // if not already computed  in mean()
746   return ftd.derived_functions().first_moment;  in mean()
751 mean(const RealVector &x, C3FnTrainData& ftd)//, size_t num_mom)  in mean()  argument
753   compute_derived_statistics_av(ftd, 2);//num_mom); // if not already computed  in mean()
754   return function_train_eval(ftd.derived_functions().ft_nonrand, x.values());  in mean()
758 Real C3Approximation::variance(C3FnTrainData& ftd)//, size_t num_mom)  in variance()  argument
760   compute_derived_statistics(ftd, 2);//num_mom); // if not already computed  in variance()
761   return ftd.derived_functions().second_central_moment;  in variance()
766 variance(const RealVector &x, C3FnTrainData& ftd)//, size_t num_mom)  in variance()  argument
768   compute_derived_statistics_av(ftd, 2);//num_mom); // if not already computed  in variance()
769   Real mu = mean(x, ftd);  in variance()
770   return function_train_eval(ftd.derived_functions().ft_squared_nonrand,  in variance()
775 Real C3Approximation::third_central(C3FnTrainData& ftd)//, size_t num_mom)  in third_central()  argument
777   compute_derived_statistics(ftd, 4);//num_mom); // if not already computed  in third_central()
778   return ftd.derived_functions().third_central_moment;  in third_central()
782 Real C3Approximation::fourth_central(C3FnTrainData& ftd)//, size_t num_mom)  in fourth_central()  argument
784   compute_derived_statistics(ftd, 4);//num_mom); // if not already computed  in fourth_central()
785   return ftd.derived_functions().fourth_central_moment;  in fourth_central()
789 Real C3Approximation::skewness(C3FnTrainData& ftd)//, size_t num_mom)  in skewness()  argument
791   compute_derived_statistics(ftd, 4);//num_mom); // if not already computed  in skewness()
792   return ftd.derived_functions().skewness;  in skewness()
796 Real C3Approximation::kurtosis(C3FnTrainData& ftd)//, size_t num_mom)  in kurtosis()  argument
798   compute_derived_statistics(ftd, 4);//num_mom); // if not already computed  in kurtosis()
799   return ftd.derived_functions().excess_kurtosis;  in kurtosis()
895   C3FnTrainData& ftd = levApproxIter->second;  in check_function_gradient()  local
896   if (ftd.ft_gradient() == NULL) {  in check_function_gradient()
897     struct FunctionTrain * ft = ftd.function_train();  in check_function_gradient()
904       ftd.ft_gradient(function_train_gradient(ft)); // differentiate ft  in check_function_gradient()
914   C3FnTrainData& ftd = levApproxIter->second;  in check_function_hessian()  local
915   if (ftd.ft_hessian() == NULL) {  in check_function_hessian()
917     struct FT1DArray * ftg = ftd.ft_gradient();  in check_function_hessian()
918     ftd.ft_hessian(ft1d_array_jacobian(ftg)); // differentiate ftg  in check_function_hessian()