questions about the 'pdeeig'

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Haya M 2020-1-24

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编辑： Ravi Kumar 2020-1-28

采纳的回答： Ravi Kumar

I'm using the syntax [?,?]=??????(?,?,?,?.1.0,?,1.0,[−1,1]); to solve a PDE on a given domain with a given ? ,

I have two questions about this syntax

How can I extract the matrices of the finite elements system for the PDE i.e

and

how I can assure that the computed eigenvalue say ?(2) corresponds to the correct eigenfunction ?(:,2)? I mean are they eigenpairs? is there any way to check that?

Thanks

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Ravi Kumar 2020-1-24

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编辑：Ravi Kumar 2020-1-27

Please use one the newer workflow like general equation based one, Structural or Thermal one. Once you setup your model in one of the newwer workflow you can get matrices using assembleFEMatrices function.

For your second question you can back substitute eigenpair into the equation and make sure the residual is near zero.

Regards,

Ravi