Karl, I'm facing issues with the matrix_range projection on a
rectangular ELL matrix:
matrix_proxy.hpp(34): error: class
"viennacl::ell_matrix<ScalarType={double}, 1U>" has no member
"cpu_value_type"
class matrix_range : public matrix_base<typename
MatrixType::cpu_value_type, typename MatrixType::orientation_functor>
^
detected during instantiation of class
"viennacl::matrix_range<MatrixType> [with MatrixType=VCL_ELL_MAT_t]"
at line 213
Does projection work on sparse MATs?
-E
On Sun, Jul 21, 2013 at 4:30 PM, Evan Bollig <bol...@gmail.com> wrote:
> For now I get past this with a type cast to enforce the RHS type:
>
> vector_range_M = (viennacl::vector<double>)
> viennacl::linalg::prod(A_MxN, vector_N);
>
> -E
>
> On Sun, Jul 21, 2013 at 4:23 PM, Evan Bollig <bol...@gmail.com> 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
>>
>>
>>
>> --
>> -Evan Bollig
>> bol...@gmail.com
>> bol...@scs.fsu.edu
>
>
>
> --
> -Evan Bollig
> bol...@gmail.com
> bol...@scs.fsu.edu
--
-Evan Bollig
bol...@gmail.com
bol...@scs.fsu.edu
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