HOWTO read GlueX hddm data from a jupyter notebook
From GlueXWiki
Two public python modules are available for reading hddm event data into a python session on a jupyter notebook environment like https://colab.research.google.com.
- gluex.hddm_s - python module for reading hddm_s events that encode raw hit information, either from simulation or real data converted from evio to hddm format.
- gluex.hddm_r - python module for reading hddm_r events that encode reconstructed event information in REST format.
Below are some examples of jupyter notebooks that demonstrate this capability in a jupyter notebook on Google colab. To enable the same functionality on your desktop or portable device, the python modules can be installed using the familiar "pip install" command.
$ pip install --user gluex.hddm_s $ pip install --user gluex.hddm_r
To demonstrate this capability in a jupyter environment, cut and paste the following block into a code cell within a freshly opened notebook.
!pip install gluex.hddm_s from gluex import hddm_s for rec in hddm_s.istream("root://nod25.phys.uconn.edu/Gluex/simulation" + "/simsamples/particle_gun-v5.2.0/particle_gun001_019.hddm"): for pe in rec.getPhysicsEvents(): if pe.eventNo % 1000 == 0: print(f"found run {pe.runNo}, event {pe.eventNo}")