Hi Charles, you can extract the row or column of a matrix using viennacl::row() and viennacl::column(), e.g.
viennacl::matrix<T> A(N, N); viennacl::vector<T> x(N); x = viennacl::row(A, 2); x = viennacl::column(A, 3); The assignment of a vector to a matrix row or matrix column is more involved, though... In either case you really want to iterate over elements and use per-element access. This is because each access entails a host<->device communication, which is very costly with CUDA and OpenCL. Best regards, Karli On 08/17/2015 03:08 PM, Charles Determan wrote: > I have seen in the documentation that it is simple to access an > individual element in a viennacl::matrix with > > mat(i,j) > > but how could I access an entire row or column? Is there similar syntax > or would I need to iterate over each element of a row/column? > > Thanks, > Charles > > > ------------------------------------------------------------------------------ > > > > _______________________________________________ > ViennaCL-devel mailing list > ViennaCL-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/viennacl-devel > ------------------------------------------------------------------------------ _______________________________________________ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
