Re: [hoomd-users] hoomd.write.Table, logging velocity

[Joshua Anderson]

Clara,

The most efficient way to write, store, and later read the velocities of all particles in the system is hoomd.write.GSD with dynamic=['property', 'momentum'].

Such files will be a fraction of the size of a text formatted file and 100x faster to read and write, even though they also contain the particle positions.

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Joshua A. Anderson, Ph.D.

Research Area Specialist, Chemical Engineering, University of Michigan

On Apr 15, 2023, at 12:26 AM, clara bae <clarab...@gmail.com> wrote:

Dear all,

Always thanks you all for help.

I am right now trying to log the velocity using hoomd.write.Table(if there are any other way that is much more efficient please do let me know!). 

Since, I do not need trajectory, I won't be outputting gad file, and want to only output csv or txt file with velocity of each particle at triggered frame. 

However, I do not know how I can only extract velocity information from logger, and also create a output file with designated named file using hoomd.write.Table. 

<Screen Shot 2023-04-15 at 12.26.14 AM.png>

If anyone can answer it I would greatly appreciate it.

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<sim_poi_stress_strain.py><Screen Shot 2023-04-15 at 12.26.14 AM.png>

[clara bae]

Dear Dr. Anderson,

Thank you. I will leave it as it is then.

Have a nice day.

To view this discussion on the web visit https://groups.google.com/d/msgid/hoomd-users/DE0F0893-5135-40F0-8953-9CB1C1669AF6%40umich.edu.

[Joshua Anderson]

Clara,

I am considering adding finer grained control to write.GSD in the next release that would allow you to write velocity without position.

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Joshua A. Anderson, Ph.D.

Research Area Specialist, Chemical Engineering, University of Michigan

To view this discussion on the web visit https://groups.google.com/d/msgid/hoomd-users/CAHh5%2BEWGo-Ypt5UAzZUT5kEvWFC9PGKcejN%3DEd3FLzet20SE8w%40mail.gmail.com.