[gmx-users] get a representative frame

[aixintiankong]

Dear,
    i want to get a representative frame from a trajectory  to analyze the interaction between the protein and ligand. first i use the g_rms command to get the rmsd-matrix.xpm file from 80ns to 100ns. The min rmsd is 0 and the max is 6. The next step i will use the g_culster to get the representative frame in clusters.pdb file, but i don't know how to set the cutoff value. please help me. thank you