c++ - How to create a vector of CvSVM -

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i want create std::vector of opencv cvsvm objects. when compile code:

typedef vector<cvsvm> svm_vec;  svm_vec svm_data = svm_vec();

an error occurs:

    in file included 2dpca.cpp:5:0: /usr/include/c++/4.8/bits/stl_construct.h: in instantiation of ‘void std::_construct(_t1*, const _t2&) [with _t1 = cvsvm; _t2 = cvsvm]’: /usr/include/c++/4.8/bits/stl_uninitialized.h:75:53:   required ‘static _forwarditerator std::__uninitialized_copy<_trivialvaluetypes>::__uninit_copy(_inputiterator, _inputiterator, _forwarditerator) [with _inputiterator = __gnu_cxx::__normal_iterator<const cvsvm*, std::vector<cvsvm> >; _forwarditerator = cvsvm*; bool _trivialvaluetypes = false]’ /usr/include/c++/4.8/bits/stl_uninitialized.h:117:41:   required ‘_forwarditerator std::uninitialized_copy(_inputiterator, _inputiterator, _forwarditerator) [with _inputiterator = __gnu_cxx::__normal_iterator<const cvsvm*, std::vector<cvsvm> >; _forwarditerator = cvsvm*]’ /usr/include/c++/4.8/bits/stl_uninitialized.h:258:63:   required ‘_forwarditerator std::__uninitialized_copy_a(_inputiterator, _inputiterator, _forwarditerator, std::allocator<_tp>&) [with _inputiterator = __gnu_cxx::__normal_iterator<const cvsvm*, std::vector<cvsvm> >; _forwarditerator = cvsvm*; _tp = cvsvm]’ /usr/include/c++/4.8/bits/stl_vector.h:316:32:   required ‘std::vector<_tp, _alloc>::vector(const std::vector<_tp, _alloc>&) [with _tp = cvsvm; _alloc = std::allocator<cvsvm>]’ 2dpca.cpp:79:29:   required here /usr/local/include/opencv2/ml/ml.hpp:553:5: error: ‘cvsvm::cvsvm(const cvsvm&)’ private      cvsvm(const cvsvm&);      ^ in file included /usr/include/c++/4.8/bits/stl_tempbuf.h:60:0,                  /usr/include/c++/4.8/bits/stl_algo.h:62,                  /usr/include/c++/4.8/algorithm:62,                  /usr/local/include/opencv2/core/core.hpp:56,                  2dpca.cpp:1: /usr/include/c++/4.8/bits/stl_construct.h:83:7: error: within context        ::new(static_cast<void*>(__p)) _t1(__value);

compiler: g++ 4.8 opencv ver 2.4.8

since cvsvm (aka svm) not copyable, need store pointers in vector. can use opencv smart pointer cv::ptr<> that. remember access methods of svm operator -> then.

this work around.

this solves problem.

#include <opencv2\opencv.hpp> #include <vector> using namespace std; using namespace cv;  int main() {     vector<ptr<svm>> svm_bank;      (int = 0; < 3; ++i)     {         mat traindata;         mat responses;          /*code trainingdata ,          responses */          svm *new_model;         new_model = new svm;         new_model->train(traindata, responses);          svm_bank.push_back(new_model);     }      (int = 0; < 3; ++i)     {         mat samples;         mat results;         svm_bank[i]->predict(samples, results);     }      return 0; }

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