Dear Maxi,
Did you try to call 'operator=' in the same line as you declare the
variable? In that case, you still go through the (missing) constructor.
It should work if you first declare the float vector in one statement
and then assign in the next. We have this function:
https://dealii.org/current/doxygen/deal.II/classLinearAlgebra_1_1distributed_1_1Vector.html#ad364c47c5b3b7b991490cd626c729f0b
Furthermore, there is also a function
LinearAlgebra::distributed::Vector::copy_locally_owned_subrange_from()
which also works with different number types, say double to float:
https://dealii.org/current/doxygen/deal.II/classLinearAlgebra_1_1distributed_1_1Vector.html#ab792ddb04b95a220e489f2d7f9eee990
(In that case, no data is exchanged, and the vectors need to have
compatible locally owned dofs before calling.)
Best,
Martin
On 23.09.19 17:07, 'Maxi Miller' via deal.II User Group wrote:
When doing that in my code, I get the error
|
error:conversion from‘Vector<double,[...]>’to non-scalar type
‘Vector<float,[...]>’requested
|
thus I assume I have to implement it myself...
Am Freitag, 13. September 2019 17:53:37 UTC+2 schrieb Wolfgang Bangerth:
On 9/13/19 8:39 AM, 'Maxi Miller' via deal.II User Group wrote:
> In my program I have to reuse old solutions (due to time
dependency),
> but would like to use them both as double values and float values
> (preconditioning does not require double values). Unfortunately
my old
> solution is only given as a
> LinearAlgebra::distributed::Vector<double>(), but I have to use a
> LinearAlgebra::distributed::Vector<float>. Direct conversion via
> LinearAlgebra::distributed::Vector<float>
float_solution(old_solution)
> does not work. Are there other ways for conversion?
I think that the other classes all have conversion constructors or
conversion operator=. If this class doesn't have one, you probably
want
to add it to support what you need. It should be a relatively easy
patch
to write, and we'd of course be happy to take it, as always!
Best
W.
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