ShiheJia
ShiheJia

Sorry for the late reply! Thanks for all the help, and i am afraid i am using a 7.2.0 version and the newly released version 7.2.1 remains the same code....

Thanks for the suggestion and I am preparing for a test. As far as I understand it, I just find that to get the absolute value of r_ij ( showed...
Well, I cannot agree with @pcarruscag any more. I try to introduce some comments into this part of code as below. ``` // loop all the neighboorhood point of point...