Thanks for the answer!
> > I have to make matrix resize with preserving of the content of the matrix.
> > (add rows, columns...)
>
> I've just tested the following program under GCC 3.1:
>
> ----------
> #include <boost/numeric/ublas/vector.hpp>
....
>
> typedef ublas::matrix<double> Mat;
This sample works if "typedef ublas::matrix<double> Mat;"
and does not work with "typedef ublas::sparse_matrix<double,ublas::column_major> Mat";
> > 2. How to do "preserving matrix resize" efficiently?
>
> I.e. without copying/swapping? Why don't you start with your final matrix
> referencing the smaller sub matrices via matrix_range<>?
This isn't clear to me. What do you mean?
I write reading matrices from files in some sparsed formats (MatrixMarket, MPS).
I will implement one-pass reading, so the number of rows, columns and nonzeros
are not known in advance.
I use "sparse_matrix<double,column_major,std::map>" for fast random access,
and I will to know how implement "preserving matrix resize" efficiently.
The only way I found does not work :(.
Also I plan to use uBLAS in some linear programming algorithms,
so adding/deleting rows/columns in sparse matrices will be very desirable...
Any ideas are welcomed...
Sincerely, Stas Fomin.
_______________________________________________
Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
