<br><div><br></div><div>I would like to calculate the inter- and intra-molecular radial distribution functions separately. I have read through g_rdf -h many times and I have a few questions:</div><div><br></div><div>1. I think that I may have to modify a trp file (and not use it for the simulations) by setting the nrexcl to the number of bonds I would like the calculation to exclude. I cannot figure out where in the tpr file I should add the nrexcl term. I have tried to sort through the manual to figure out how to make this modification but I cannot figure it out. Does anyone have any suggestions?</div>
<div><br></div><div>2. In D.56 g_rdf of the Gromacs manual it says that the option -surf can be used along with -rdf to only calculate the rdf of a molecule with its closest neighbor in a set. Can this option be used for calculating the intramolecular radial distribution function or am I completely misinterpreting the manual? If it can be used how is this done? I tried to use it but I get the error message: Invalid command line argument:</div>
<div>-surf</div><div><br></div><div>Thank you in advance for any help.</div><div><br></div><div>Emily</div>