"Need for writing first interaction information"

Solves #639 (closed)

Writes out the

• pdg ID
• position
• momentum vector
• time
• dX

python/examples/shower_profile.py

@@ -32,8 +32,8 @@ def plot_avg_profile(dat, part, ax):
     nshower = len(dat.shower.unique())  # number of showers in output dir
     max_dX = np.max(dat["X"])
     h = np.histogram(
-        dat.X,
-        bins=np.linspace(0, max_dX, len(dat["X"]) - 1),
+        dat.X, 
+        bins=np.linspace(0, max_dX, len(dat["X"]) - 1), 
         weights=dat[part] * 1 / float(nshower),
     )
     ax.plot(h[1][:-1], h[0], label=part)