Hi Evan, I just pushed support for sparse matrix-vector products when using vector-ranges and vector-slices.
https://github.com/viennacl/viennacl-dev/commit/7e68860886d6461e483a5965e0ede68146c74189 You cannot take ranges and slices of the matrix at the moment. Best regards, Karli On 07/21/2013 04:23 PM, Evan Bollig wrote: > Btw Karl: > > vector_range_M = viennacl::linalg::prod(A_MxN, vector_N); > > does not work. That would be equivalent to: > > vector_range_M = project( viennacl::linalg::prod(A_MxN, vector_N) , 0,M ); > > -E > > > > > On Sun, Jul 21, 2013 at 4:13 PM, Evan Bollig <bol...@gmail.com> wrote: >> Ah I see. Thanks for the clarification on projecting the LHS. I was >> trying to assign the result to an unprojected vector assuming (vector >> - vector_range) would return a vector and (vector_range - vector) >> would return a vector_range (i.e., operation returns operand type). >> >> -E >> >> On Sun, Jul 21, 2013 at 4:09 PM, Karl Rupp <r...@iue.tuwien.ac.at> wrote: >>> Hi Evan, >>> >>> >>>> Can you refresh my memory on how ViennaCL behaves with this operation: >>>> >>>> >>>> vector = vector - vector_range >>>> >>>> I would like to subtract an M < N sized vector_range from an N sized >>>> vector (by operating on the first M elements). Is this supported in >>>> 1.4.2? >>> >>> >>> Yes, this is supported. You can just use >>> >>> project(x, range(a, b)) = project(y, range(c, d)) - z; >>> >>> where z is some existing vector_range. Mixing of vectors with ranges and >>> slices is perfectly fine and supported. >>> >>> Best regards, >>> Karli >>> >> >> >> >> -- >> -Evan Bollig >> bol...@gmail.com >> bol...@scs.fsu.edu > > > ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
