Add Matrix to SymbolicBFI

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3 years 6 months ago #3772 by creativeworker
Add Matrix to SymbolicBFI was created by creativeworker
Hello,

is there any possibility to add a constant Matrix to the Bilinear Form?
Code:
a = BilinearForm(fes) a+= SymbolicBFI(weak_K(u,v)) a+= "const. Matrix from Numpy" #either here a.Assemble() a.mat += "const Matrix form Numpy" # or here (but does then a.AssembleLinearization() work later?)

The benefit would be that I can still use a.Apply, a.AssembleLinearization, etc... as I would with only considering the "analytical, continous" weak form of my problem.

Thanks for your help in advance!
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3 years 5 months ago #3782 by christopher
Replied by christopher on topic Add Matrix to SymbolicBFI
One should be able to create a scipy sparse matrix like here:
docu.ngsolve.org/latest/i-tutorials/unit...ighlight=scipy%20csr

and if copy=False argument is set, one should be able to manipulate the underlying c++ matrix. But not 100% sure if no copy is involved so please check!

Best
Christopher
The following user(s) said Thank You: creativeworker
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