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I have got it solved. The version 2.1.0 has added a new command setElementDampingFactors which is, however, not in the current command mannual.

Hello, I want to construct nonproportional damping matrix in transient analysis, but long time have I payed on reading the source codes for valid information, whereas without success. Would anyone please offer me some idea about the frame of the source codes? What should be payed attention to if I w...

johnd wrote:
> hi, nice to see your community , suggest me book about C++..Any body?
I recommend you the book C++ prime plus, now the 6th version of which is available.

I recommend Notepad++, an excellent editor.