Manipulating .g2 Files

[Eliza Diggins]

Hi all,

I'm in need of a way to make edits to .g2 initial condition files and then resave them. I'm building initial condition files of single galaxy clusters and I'd like to be able to create files with multiple identical clusters by manipulating the original file. Is this possible in Pynbody? If not, are there tools that you would recommend?

Thanks,

Eliza Diggins

[Rubens Machado]

hi Eliza,

If you only need to handle isolated clusters (i.e. non-cosmological) in type 2 Gadget format, then these simple tools might be useful: https://github.com/regmachado/SnapGadget specially the snapmanip.py which is an empty example of how to read/manipulate/write.

I suspect it can be done in pynbody. There was a thread "Create gadget snapshot file from scratch" on May 1, 2020.

cheers,
Rubens

[Eliza Diggins]

Awesome! This is really helpful. This looks to be easily manipulable for my need!