Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread ms
On 10/11/10 22:28, Justin A. Lemkul wrote: First, let me see if I understand it correctly. From your explanation (and intuition), it seems that the issue is that "center of mass" in a periodic environment is ambiguous -there are always (at least) two alternate configurations that have the center

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread Justin A. Lemkul
ms wrote: On 10/11/10 21:34, Justin A. Lemkul wrote: ms wrote: On 09/11/10 21:36, Justin A. Lemkul wrote: There are numerous -pbc options with trjconv; have you tried others? I have never had luck with -pbc nojump actually working, and -pbc atom provides no guarantee that molecules will b

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread ms
On 10/11/10 21:34, Justin A. Lemkul wrote: ms wrote: On 09/11/10 21:36, Justin A. Lemkul wrote: There are numerous -pbc options with trjconv; have you tried others? I have never had luck with -pbc nojump actually working, and -pbc atom provides no guarantee that molecules will be properly re

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread Justin A. Lemkul
ms wrote: On 09/11/10 21:36, Justin A. Lemkul wrote: There are numerous -pbc options with trjconv; have you tried others? I have never had luck with -pbc nojump actually working, and -pbc atom provides no guarantee that molecules will be properly reconstructed. Using -pbc mol -center is often

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread ms
On 09/11/10 21:36, Justin A. Lemkul wrote: There are numerous -pbc options with trjconv; have you tried others? I have never had luck with -pbc nojump actually working, and -pbc atom provides no guarantee that molecules will be properly reconstructed. Using -pbc mol -center is often a much bette

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-10 Thread ms
On 09/11/10 21:36, Justin A. Lemkul wrote: I am doing REMD simulations of multiple homopolymeric peptides in a PBC box, in vacuum (it's a custom coarse grain). GROMACS 4.0.5. I want to analyze features of the system that require to use g_gyrate to find out the moments of inertia of the system, fo

Re: [gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-09 Thread Justin A. Lemkul
ms wrote: Hi, I am doing REMD simulations of multiple homopolymeric peptides in a PBC box, in vacuum (it's a custom coarse grain). GROMACS 4.0.5. I want to analyze features of the system that require to use g_gyrate to find out the moments of inertia of the system, for example. I understa

[gmx-users] trjconv, pbc and breaking of multiple peptides

2010-11-09 Thread ms
Hi, I am doing REMD simulations of multiple homopolymeric peptides in a PBC box, in vacuum (it's a custom coarse grain). GROMACS 4.0.5. I want to analyze features of the system that require to use g_gyrate to find out the moments of inertia of the system, for example. I understand g_gyrate i