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Re: [Question #682883]: calculate mass content of a group of particles through something like label

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: gaoxuesong <question682883@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 15 Aug 2019 04:22:34 -0000
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Question #682883 on Yade changed:
https://answers.launchpad.net/yade/+question/682883

    Status: Open => Answered

gaoxuesong proposed the following answer:
Hi,

    The possible way i think is that using different lists to save the sphere's id of different groups and do loop in each list. 
## group 1 ##  
list1 = [] 
list1.append(O.append(sphere((x1,y1,z1),radius=radius1)))
... 
## group 2 ## 
list2 = [] 
list2.append(O.append(sphere((x2,y2,z2),radius=radius2)))
... 
## calculate the mass of different groups ## 
masstotal1 = 0 
for each in list1:
    masstotal1 + = O.bodies[each].state.mass 
masstotal2 = 0 
for each in list2:
    masstotal2 + = O.bodies[each].state.mass 

## ends ##

Cheers, 
Xuesong

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