Resolve "Add true decaying particle info onto event display"

Closes #43 (closed)

benchmarks/imaging_ecal/scripts/draw_cluster.py

@@ -5,6 +5,10 @@
 
     Author: Chao Peng (ANL)
     Date: 04/30/2021
+
+    Added true decaying particles on eta-phi plane projection plot
+    Author: Jihee Kim (ANL)
+    Data: 08/06/2021
 '''
 
 import os
@@ -144,10 +148,10 @@ if __name__ == '__main__':
     df['eta'] = -np.log(np.tan(df['theta'].values/1000./2.))
 
     # Read all mc particles
-    ########################
     dfallmcp = get_all_mcp(args.file, args.iev, 'mcparticles2')
     # Select decaying particles
-    dfdecaymcp = dfallmcp[dfallmcp['g4Parent'] == 1.0]
+    dftemp = dfallmcp[dfallmcp['g4Parent'] == 1.0]
+    dfdecaymcp = dftemp.copy()
     pdgbase = ROOT.TDatabasePDG()
     for iptl in [0, len(dfdecaymcp) - 1]:
         infoptl = pdgbase.GetParticle(int(dfdecaymcp['pid'].iloc[iptl]))