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Create tool to ensure all events with reweighted posterior samples have the same source parameters

Need a tool to combine reweighted posterior samples from all events into one ND array. This requires padding some columns where a parameter may not be relevant to an event, e.g. tidal parameters for BBHs. Here's a sketch of the functionality:

  1. Inputs:
  • a list called event_parameters that specifies which parameters will be present for every event in the final popsummary file
  • N arrays with shape (NumberOfDraws, NumberOfHyperSamples, NumberOfEventDimensions_i) where i = 1...N corresponding to each event.
  1. Outputs:
  • an array of shape (NumberOfEvents, NumberOfDraws, NumberOfHyperSamples, NumberOfEventDimensions) where NumberOfEventDimensions corresponds to the the size of event_parameters