Are subhalo IDs available in illustris_python searches?
Kevin Andrade
1 Dec '22
I'm trying to adapt some Python code from using the Illustris web api to using illustris_python in the Lab. When using the web api, I was able to search subhalos and return a list of the subhalo IDs that match my desired criteria. However, I can't see a similar way to do this using illustris_python. Am I missing it?
Dylan Nelson
2 Dec '22
Yes, a "search" over catalog properties in the Lab (or if you downloaded the data to your own system) really means:
(1) load the properties of interest from the catalog
(2) use np.where
For example, to search for subhalos with star formation rates between 5 and 8 Msun/yr, then
I'm trying to adapt some Python code from using the Illustris web api to using illustris_python in the Lab. When using the web api, I was able to search subhalos and return a list of the subhalo IDs that match my desired criteria. However, I can't see a similar way to do this using illustris_python. Am I missing it?
Yes, a "search" over catalog properties in the Lab (or if you downloaded the data to your own system) really means:
(1) load the properties of interest from the catalog
(2) use
np.whereFor example, to search for subhalos with star formation rates between 5 and 8 Msun/yr, then
I see, so the ids correspond one-to-one with the positions of the values returned from the search. Thanks!