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These lines create and fill an unbinned one-dimensional histogram named nTracks with the return value of tracks.size()
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Viewing and Loading Plots
Lets start with viewing AIDA objects. You can either create them with the AIDA examples, the org.lcsim examples or you can load an existing AIDA file with File->Open File... in the menu.
All AIDA objects are arranged in trees. You can have many trees open at the same time. Trees are represented as
Saving in various graphics formats (e.g. PNG, EMF, JPG, etc.)
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