Hi I am trying to understand the pull code with the tutorial i found from here.
http://www.csc.fi/chem/course/gmx2007/ i have a confusion about it. when i put one atom in the reference group and the other atom in the group_1, doesn't it mean that, the pulling should be in one direction? But the result i am getting, it looks like it is pulled in both way. and if I wanted to pull with a group of atom, should I just put the atoms in group_2, group_3, in this manner? can any one help me with this? Thanks in advance. Tawhid
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