How to get RMSD from beginning to end after extending simulation

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Dear all,
I performed 150ns simulation and the I extended to another 50 ns (total 200ns). I have faced problems in calculating RMSD from 1ns to 200 ns due to extending the simulation time
My question is,
How can I get RMSD from 1ns to 200 ns?

2

Hello,

You can combine the xtc files from the 150 ns and 50 ns simulations using ‘gmx trjcat,’ and then calculate the rmsd for the combined trajectory.