Dear Prof. Bangerth
The definition of class PointHistory is as follows:
````
24 class PointHistory : public TransferableQuadraturePointData
23 {
22 public:
21 void
20 update(std::string name, double solution, std::string scheme =
"latest");
19 void
18 update_independent(std::string name,
17 double solution,
16 std::string scheme = "latest");
````
It is used to store my hist variable while assembling the stiffness matrix.
Thanks for your suggestion, I'll take a look.
Best regards,
Junxiang.
On Friday, January 17, 2025 at 1:06:12 PM UTC+8 Wolfgang Bangerth wrote:
> On 1/16/25 18:40, Junxiang Wang wrote:
> >
> > const std::vector<std::shared_ptr<PointHistory>> lqph =
> > quadrature_point_history.get_data(cell);
> >
> > to record some history variables (e.g., max and min) at quadrature_point.
> >
> > Is there a way to output the nodal value of the history value? I am
> currently
> > using DataPostprocessorVector to handle my output.
>
> I don't know what the PointHistory class does (did you mis-spell the name
> of a
> deal.II class?), but if I understand you correctly, then this is the value
> (or
> multiple values) of the solution at a specific point. DataOut does not
> have
> facilities to output point values itself, but you can work around this by
> creating a ParticleHandler that has particles at quadrature points (I
> think
> either step-70 or step-83) shows this, then transfer your history variable
> from quadrature points to the particles, and then you can output this
> information via particles::DataOut. This information can then be
> visualized
> alongside the field data you output separately via DataOut.
>
> Best
> W.
>
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth email: bang...@colostate.edu
> www: http://www.math.colostate.edu/~bangerth/
>
>
>
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