Hi,

I am trying to convert a coordinate_matrix to a compressed_matrix using the "assign" function and got weird compilations errors. Could you please help me with what the problem is.

I am running the following code:

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int size=10;

typedef ublas::coordinate_matrix<double> data_type_1;

typedef ublas::compressed_matrix<double> data_type;

data_type_1 A(size,size, 9*size);

data_type M;

M.resize(A.size1(),A.size2(),A.nnz());

// Convert matrix A into a compressed one.

M.assign(A); // <----------- Error occurs here!

-------------------------

I get the following compilation errors:

/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_tempbuf.h: In constructor 'std::_Temporary_buffer<_ForwardIterator, _Tp>::_Temporary_buffer(_ForwardIterator, _ForwardIterator) [with _ForwardIterator = boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>, _Tp = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >]':

/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_algo.h:3084:17: instantiated from 'void std::inplace_merge(_BIter, _BIter, _BIter) [with _BIter = boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>]'

/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4403:17: instantiated from 'void boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::sort() const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >]'

/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4486:13: instantiated from 'boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::const_iterator1 boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::find1(int, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type, int) const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type = long unsigned int]'

/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4798:34: instantiated from 'boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::const_iterator1 boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::begin1() const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >]'

/usr/include/boost/numeric/ublas/detail/matrix_assign.hpp:909:57: instantiated from 'void boost::numeric::ublas::matrix_assign(M&, const boost::numeric::ublas::matrix_expression<E>&, boost::numeric::ublas::sparse_tag, boost::numeric::ublas::row_major_tag) [with F = boost::numeric::ublas::scalar_assign, R = boost::numeric::ublas::basic_full<>, M = boost::numeric::ublas::compressed_matrix<double>, E = boost::numeric::ublas::coordinate_matrix<double>]'

/usr/include/boost/numeric/ublas/detail/matrix_assign.hpp:1216:9: instantiated from 'void boost::numeric::ublas::matrix_assign(M&, const boost::numeric::ublas::matrix_expression<E2>&) [with F = boost::numeric::ublas::scalar_assign, M = boost::numeric::ublas::compressed_matrix<double>, E = boost::numeric::ublas::coordinate_matrix<double>]'

/usr/include/boost/numeric/ublas/matrix_sparse.hpp:2992:13: instantiated from 'boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA>& boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA>::assign(const boost::numeric::ublas::matrix_expression<E1>&) [with AE = boost::numeric::ublas::coordinate_matrix<double>, T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >, boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA> = boost::numeric::ublas::compressed_matrix<double>]'

mexLapBoo.cc:254:12: instantiated from here

/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_tempbuf.h:192:6: error: invalid initialization of non-const reference of type 'boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >&' from an rvalue of type 'boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>::reference'

/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_uninitialized.h:223:5: error: in passing argument 3 of 'void std::__uninitialized_construct_range(_ForwardIterator, _ForwardIterator, _Tp&) [with _ForwardIterator = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >*, _Tp = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >]'

Your help is really appreciated. Thanks a lot!