Re: get seed

From: Jérôme Hénin (
Date: Fri Jul 01 2016 - 12:39:28 CDT

Dear Laura,

The given seed is used to initialize several PRNGs at different points in
the code, and if you run in parallel, independent PRNGs on different
processors. Parallel runs are definitely not reproducible.


On 1 July 2016 at 18:52, Laura Joana <> wrote:

> Dear users!
> Maybe my question is more for developers than for users...
> I'm interest in being able to reproduce some of my results, so I need to
> fix the seed in NAMD. No problem with that, the "seed" command do it for
> me! But, Lets say that I have a trajectory made by two peaces...
> First of all I start with one fixed seed and I run one trajectory. Then,
> using one point in the middle of this trajectory I run another one. How
> could I redo the two pieces of the trajectory without storing the position
> and velocities from this middle point? I can just have the initial position
> + velocity + seed of the first point, the number of steps until the middle
> point and the seed of the middle point!
> So my question is:
> *Is there a way in NAMD to get the seed he is going to use for the next
> random number ?*
> Thanks,
> Laura

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