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This page holds a few example code-snippets for use in pyana analysis. The analysis is written in python and uses MatPlotLib.PyPlot for plotting of data. Compare with myana user examples to see how (some of) the same things can be done using the myana analysis framework.

For all the examples, you may assume that the pyana module contains a class with at least 'beginjob', 'event' and 'endjob' functions that starts something like this:

import numpy as np
import matplotlib.pyplot as plt
from pypdsdata import xtc

class mypyana(object):
    def __init__(self,source=""):
        self.source = source
        self.counter = None

    def beginjob(self,evt,env):
        self.counter = 0

    def event(self,evt,env):
        self.counter += 1

        # snippet code goes here
        thedata = evt.get(xtc.TypeId.Type.Id_SomeType, self.source )

    def endjob(self,evt,env):
       print "Job done! Processed %d events. " % self.counter

       # place for plotting etc

BeamLine Data: EBeam

To read out energy, charge and position of the beam from the beamline data, use getEBeam(). It returns a class/structure that has the following members/fields:

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