Re: [Libmesh-users] How to avoid complex numbers?

[Hubert W. <hub...@gm...>]

Hi Edgar,

yes you are right. Sorry; than I misinterpreted your question.
Than I agree with Paul below; but AFAIK the `Systems` matrix/rhs (and 
thus solution) allways are of `Number` type!?

At least for the `Linear` systems, I am not aware of a builtin way to 
change this.

Best regards


On 8/23/21 2:58 PM, Paul T. Bauman wrote:
> Hi Edgar,
>
> The way I think you'll want to handle this is using libMesh's built-in
> numeric types. libMesh::Number will be a complex-valued quantity when
> libMesh is compiled with complex numbers and a standard float when not.
> libMesh::Real will always be a standard float, regardless of the complex
> mode that libMesh is configured with. So the part of your program that you
> wish to be real-valued, use libMesh::Real.
>
> HTH,
>
> Paul
>
> On Mon, Aug 23, 2021 at 7:53 AM edgar <edg...@cr...> wrote:
>
>> Hi Hubert!
>>
>> Thanks. It seems that the option which you are sending is for the
>> overall libMesh compilation (correct me if I'm wrong). I am interested
>> in having my libMesh with the ability to process complex numbers, and
>> just compiling a specific program (not the whole libMesh) without
>> complex numbers. Do you know if there is a way for that? Thank you
>> again.
>>
>>
>> On 2021-08-23 08:33, Hubert Weissmann wrote:
>>> Good morning Edgar,
>>>
>>> using ``--enable-complex=no`` should do you that trick.
>>> In the output of `configure --help` is a statement
>>>
>>>
>>> Optional Features:
>>>    --disable-option-checking  ignore unrecognized --enable/--with
>>> options
>>>    --disable-FEATURE       do not include FEATURE (same as
>>> --enable-FEATURE=no)
>>>    --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
>>>
>>> which is a bit hidden if one seeks for a particular option.
>>>
>>> I hope, this help you.
>>>
>>> All the best
>>> Hubert
>>
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