[gmx-users] PMF from pull code, unexpected results

2011-02-24 Thread Michael Brunsteiner
> Michael: your mdp options indicated using US and my stance is that, > using >US, you are incorrect to say that "And you will get the SAME > result if you >do this calculation in one or in three dimensions > (pulldim NNY or pulldim >YYY)". this has nothing to do with the mdp file ... i w

[gmx-users] PMF from pull code, unexpected results

2011-02-24 Thread chris . neale
Michael: your mdp options indicated using US and my stance is that, using US, you are incorrect to say that "And you will get the SAME result if you do this calculation in one or in three dimensions (pulldim NNY or pulldim YYY)". Nevertheless, I'm a little perturbed by your call out for hel

[gmx-users] PMF from pull code, unexpected results

2011-02-21 Thread chris . neale
Looking at http://www.brunsteiner.net/tbut-pmf.gif you seem to be getting exactly what I would expect. The difference is the entropy term. Note that the spherical shell increases volume as r increases for pulldim YYY but this effect is absent for pulldim NNY. This is why you can correct as

[gmx-users] PMF from pull code, unexpected results

2011-02-21 Thread Michael Brunsteiner
Dear all, I would like to calculate the potential of mean force between two molecules in aqueous solution using the pull code. For a start i performed a number of calulations with a couple of very simple model systems with settings loosely based on the example in the gmx tutorial section (see m