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[AnnaMaria <question685862@xxxxxxxxxxxxxxxxxxxxx>]

Question #685862 on Yade changed:
https://answers.launchpad.net/yade/+question/685862

    Status: Answered => Open

AnnaMaria is still having a problem:
Hello everyone again:
I have created the hollow cylinder as Jan Stransky suggested, (MWE):
for p in O.bodies:
  x=p.state.refPos[0]
  z=p.state.refPos[2]
  d=sqrt(pow(x,2)+pow(z,2))
  if d>r1 and d<r2:
   p.shape.color=(1,1,1)
   #Mesure state.refPos of the particles, within this domain.
   xnew=p.state.refPos[0]
   znew=p.state.refPos[2]
   dnew=sqrt(pow(xnew,2)+pow(znew,2)) 
Then I am trying to record the lateral strain:
def recorder():
 global d
 global dnew
 elat=((d)-(dnew))/(d)
but it does not work. I am not getting any values!
I can’t understand what i have been doing wrong all this time. 
Could you help me. Thanks in advance.

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