On Sat, 8 Dec 2012, 蔡园武 wrote:
I found that all examples used DenseSubMatrix to assemble stiffness matrix,
something like Kuu,Kuv,Kvu,Kvv. I used to do like that, but recently I
tried to assemble Ke directly, not using DenseSubMatrix, and I found the
result is the same as using DenseSubMatrix. So why all examples use
DenseSubMatrix to assemble Ke? Is it a consideration of efficiency or
something else?
Just ease of use and flexibility. I wouldn't expect DenseSubMatrix to
be any more (or less!) efficient than doing the local-variable to
local-total element index tranforms by hand.
---
Roy
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