old_contents: """
  ==================
  zt-plots.
  ==================
  
  This example shows how to create a zt-plot of a given DU and event ID.
  """
  
  import pandas as pd
  import matplotlib.pyplot as plt
  import km3pipe as kp
  import km3pipe.style
  km3pipe.style.use('default')
  
  
  DU = 26
  EVENT_ID = 23
  filename = "data/km3net_jul13_90m_muatm50T655.km3_v5r1.JTE_r2356.root.0-499.h5"
  geometry = kp.Geometry(filename="data/km3net_jul13_90m_r1494_corrected.detx")
  
  all_hits = pd.read_hdf(filename, 'hits')
  hits = all_hits[all_hits.event_id == EVENT_ID].copy()
  geometry.apply(hits)
  
  fig, ax = plt.subplots()
  
  hits[hits['du'] == DU].plot('time', 'z', style='.', ax=ax)
  triggered_hits = hits[(hits['du'] == DU) & (hits['triggered'] == True)]
  triggered_hits.plot('time', 'z', style='.', ax=ax)
  
  try:
      ax.legend_.remove()
  except AttributeError:
      pass
  ax.set_title("zt-plot of event {0} on DU{1}".format(EVENT_ID, DU))
  ax.set_xlabel("time [ns]")
  ax.set_ylabel("z [m]")
  
new_contents: """
  ==================
  zt-plots.
  ==================
  
  This example shows how to create a zt-plot of a given DU and event ID.
  """
  
  import pandas as pd
  import matplotlib.pyplot as plt
  import km3pipe as kp
  import km3pipe.style
  km3pipe.style.use('default')
  
  
  DU = 26
  EVENT_ID = 23
  filename = "data/km3net_jul13_90m_muatm50T655.km3_v5r1.JTE_r2356.root.0-499.h5"
  geometry = kp.Geometry(filename="data/km3net_jul13_90m_r1494_corrected.detx")
  
  all_hits = pd.read_hdf(filename, 'hits')
  hits = all_hits[all_hits.event_id == EVENT_ID].copy()
  geometry.apply(hits)
  
  fig, ax = plt.subplots()
  
  hits[hits['du'] == DU].plot('time', 'pos_z', style='.', ax=ax)
  triggered_hits = hits[(hits['du'] == DU) & (hits['triggered'] == True)]
  triggered_hits.plot('time', 'pos_z', style='.', ax=ax)
  
  try:
      ax.legend_.remove()
  except AttributeError:
      pass
  ax.set_title("zt-plot of event {0} on DU{1}".format(EVENT_ID, DU))
  ax.set_xlabel("time [ns]")
  ax.set_ylabel("z [m]")
  
subject: fix z-t example