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[Lei Hang <question691688@xxxxxxxxxxxxxxxxxxxxx>]

New question #691688 on Yade:
https://answers.launchpad.net/yade/+question/691688

Dear all,

When I study the Gravity deposition example in the yade documentation, some places of the script confuse me a lot.
The script link is as following:
https://gitlab.com/yade-dev/trunk/blob/master/doc/sphinx/tutorial/03-oedometric-test.py

My questions:
1. In the first line "readParamsFromTable(rMean=.05,rRelFuzz=.3,maxLoad=1e6,minLoad=1e4)", are they the default values of the variables in the parameters table? 

2.In the line "O.forces.f(O.forces.f(plate.id)[2]", Why the "plate.id" not write as"plate" directly? Does the [2] mean Z-coordinate？

3. Does the "plate.state.vel*=-1" just mean the opposite orientation of former velocity "plate.state.vel=(0,0,-.1)"? Are the values of the two velocity same?

4.Why "plot.saveDataTxt(O.tags['d.id']+'.txt')" not write as "plot.saveDataTxt(O.tags['d.id'].txt.bz2')"?

Many thanks in advance!

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