Qt+Octave+​libSVM+(Li​nux/Mac).

I need to use the following method to work with the library libSVM: Qt+Octave+libSVM+(Linux/Mac). LibSVM works with Octave without Qt, but I need to use Qt to run built-in and external functions Octave. SVMTrain is a mex-function and when calling it occurs segmentation fault 11. I don't know how to solve this problem, please help to resolve this.

QT += widgets gui

SOURCES += \ main.cpp

LIBS += -L /usr/local/Cellar/octave/4.2.1_6/lib/octave/4.2.1 -loctave -loctinterp

INCLUDEPATH += /usr/local/Cellar/octave/4.2.1_6/include/octave-4.2.1/octave

CONFIG += c++11 console CONFIG -= app_bundle

#include QCoreApplication // #include iostream #include string // #include oct.h #include octave.h #include parse.h #include toplev.h #include interpreter.h #include builtin-defun-decls.h #include Cell.h #include Matrix.h #include cmd-edit.h #include cmd-hist.h #include file-ops.h #include file-stat.h #include oct-env.h #include oct-time.h #include quit.h #include comment-list.h #include defaults.h #include dirfns.h #include dynamic-ld.h #include error.h #include input.h #include lex.h #include load-path.h #include oct-hist.h #include oct-map.h #include ov-fcn-handle.h #include ov-usr-fcn.h #include ov-null-mat.h #include toplev.h #include pager.h #include parse.h #include pt-all.h #include pt-eval.h #include symtab.h #include token.h #include unwind-prot.h #include utils.h #include variables.h

void runscript(const std::string &file) { eval_string(file, false, parse_status, 0); }

int main(int argc, char argv[]) { // create qt app QCoreApplication app(argc, argv); // create octave app string_vector octave_argv (2); octave_argv(0) = "embedded"; octave_argv(1) = "-q"; octave::embedded_application app_oct(2, octave_argv.c_str_vec()); app_oct.execute(); //octave_main(2, octave_argv.c_str_vec (), true); //--------------------------------------- // verified code for show workable octave octave_value_list abs_in; // complex variable abs_in(0) = Complex(3, 4); // result = 5 // run built-in function 'abs' octave_value_list abs_ret = feval("abs", abs_in); // to terminal std::cout << "Abs result = " << abs_ret(0).double_value() << std::endl; //-------------------------------------- // load my function load_fcn_from_file("Emulate.m", "", "", "", "Emulate", true); // load_1 octave workspace ( work )) ) runscript("load EmulateData.mat;"); // load_2 octave workspace ( not work (( ) /*octave_value_list args; // MATLAB 6 (save -6 EmulateData.mat) args(0) = "EmulateData.mat"; args(1) = "a"; feval("load", args, 0);/ // get variable from workspace SparseMatrix trainData = get_top_level_value("trainData", false).sparse_matrix_value(); Matrix trainLabel = get_top_level_value("trainLabel", false).matrix_value(); SparseMatrix testData = get_top_level_value("testData", false).sparse_matrix_value(); Matrix testLabel = get_top_level_value("testLabel", false).matrix_value(); // create list with created variables for svmtrain-function octave_value_list in; in(0) = trainLabel; in(1) = trainData; in(2) = testLabel; in(3) = testData; // run external function with svmtrain-function octave_value_list result = feval("Emulate", in, 1); std::cout << "<= EXIT" << std::endl; return 0; }