[gmx-users] g_rdf -com

[mohammad agha]

Dear Prof.

I have a question about g_rdf.
I have a box consists of 500 surfactants that make 10 micelle. I want to compute rdf for surfactant relative to the center of mass of micelle.
When I do g_rdf, the program ask me 2 groups that the first one is COM, but it is COM of molecules that I defined in index file.
If I select the surfactant molecules as the first group for COM, this means the COM of micelle or just surfactants?
If it select just COM of surfactants, then what do I do for selection of COM of micelle?
Please help me.

Best Regards
Sara
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