Reply To: Arbitrary sign for eigen mode

[Guilin Sun]

I can duplicate your result now. However it is the 2nd mode. The fundamental mode works fine.

I believe it is due to the global deck issue, not the findmodes. The problem is, once the data is in the global deck, we cannot access it except directly use its data. That said, we cannot check what happens to the global deck data.

If you can save the mode data in script, and then calculate the "expand" with sweep, and if it gives the same wrong result, then it is the findmodes issue.

Please note that the global deck data is not designed to use this way. If your goal is to prove that the gobal deck has something wrong with such usage, I agree. However it may not be get rectified, as all the bugs and features are by vote to correct, and it takes time.

In order not to hinder your project, I would strongly suggest that you use script to calculate the expansion,since the formula is known.