Re: [gmx-users] trjconv -dt issue

2015-08-20 Thread Mark Abraham
Hi, This is indeed problematic. The .edr format (and its tools) are designed with limitations that were not really a problem 10 years ago. One of the limitations is that the time itself is stored in the same precision as the simulation data, and this starts to lose precision as the simulation

Re: [gmx-users] trjconv -dt issue

2015-08-20 Thread Matthias Ernst
Thanks for your explanation, Mark. Concerning energy files and eneconv: - I will try double-precision eneconv, as I don't mind larger files. - In reply to the advice to reset the time of the energy files: how to do it? eneconv has no option for this, although the help states: With one file

Re: [gmx-users] trjconv -dt issue

2015-08-20 Thread Mark Abraham
Hi, On Thu, Aug 20, 2015 at 4:00 PM Matthias Ernst matthias.er...@physik.uni-freiburg.de wrote: Thanks for your explanation, Mark. Concerning energy files and eneconv: - I will try double-precision eneconv, as I don't mind larger files. - In reply to the advice to reset the time of the

[gmx-users] trjconv -dt issue

2015-08-19 Thread Matthias Ernst
Hello, I have a quite long continuous trajectory coming from several initial input pieces (cluster crashed...) that I want to downsample, as a start from 0.5ps timestep in the source files to just 1ps and later bigger timesteps. Using the -dt option of trjconv (GROMACS 4.6.5.), there seem to be