zentara already linked to the Wikipedia article on Ramachandran plot. I'm sure that your workplace or university has a library or colleagues/teachers where you can learn more about the topic. While we explore mathematical and algorithmical properties here from time to time, it seems to me that you have to do some basic learning about the topic first, in which we cannot help you.

In reply to Re^3: ramachandran plot by Corion
in thread ramachandran plot by abhi4.amity

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