“Segregate Analysis dialog ”have four options:

• Segregate size - plots probability against the segregate volume.
  
• Segregate major axis - plots probability against the major axis length of a fitted ellipsoid.
  
• Segregate radius (best-fit sphere) - plots probability against the sphere radius.
  
• Segregate separation - plots probability against the distance between segregates.
  

I want to know that how to compute the these parameters (e.g. what is the equations?), and I want to know that if Segregate Analysis can give the parameter of the cylinder (the hight and the diameter) after a DPD's run.

Thank you very much!