LCLS off-line provides two frameworks for analysis of the LCLS data – pyana which is a Python-based framework; and psana which is based on C++. Pyana was developed during the first year of LCLS running with the intention to experiment with the several different approaches for data access and analysis. Pyana supports data reading from XTC files only. Psana was built later based on the experience obtained while experimenting with pyana. Currently psana can read data from XTC files but it will be extended to support HDF5 data too. In the future pyana framework may be reimplemented based on psana framework.
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