EventWorkspaceHelpers.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidDataObjects/EventWorkspaceHelpers.h"
#include "MantidAPI/AnalysisDataService.h"
#include "MantidAPI/WorkspaceFactory.h"
#include "MantidDataObjects/Workspace2D.h"
#include "MantidKernel/Exception.h"
 
using namespace Mantid::API;
using namespace Mantid::DataObjects;
 
namespace Mantid::DataObjects {
 
MatrixWorkspace_sptr EventWorkspaceHelpers::convertEventTo2D(const MatrixWorkspace_sptr &inputMatrixW) {
  EventWorkspace_sptr inputW = std::dynamic_pointer_cast<EventWorkspace>(inputMatrixW);
  if (!inputW)
    throw std::invalid_argument("EventWorkspaceHelpers::convertEventTo2D(): "
                                "Input workspace is not an EventWorkspace.");
 
  size_t numBins = inputW->blocksize();
 
  // Make a workspace 2D version of it
  MatrixWorkspace_sptr outputW;
  outputW = WorkspaceFactory::Instance().create("Workspace2D", inputW->getNumberHistograms(), numBins + 1, numBins);
  WorkspaceFactory::Instance().initializeFromParent(*inputW, *outputW, false);
 
  // Now let's set all the X bins and values
  for (size_t i = 0; i < inputW->getNumberHistograms(); i++) {
    outputW->getSpectrum(i).copyInfoFrom(inputW->getSpectrum(i));
    outputW->setSharedX(i, inputW->sharedX(i));
 
    Mantid::HistogramData::HistogramY &Yout = outputW->mutableY(i);
    Mantid::HistogramData::HistogramY const &Yin = inputW->y(i);
    for (size_t j = 0; j < numBins; j++) {
      Yout[j] = Yin[j];
    }
 
    Mantid::HistogramData::HistogramE &Eout = outputW->mutableE(i);
    Mantid::HistogramData::HistogramE const &Ein = inputW->e(i);
    for (size_t j = 0; j < numBins; j++) {
      Eout[j] = Ein[j];
    }
  }
 
  return outputW;
}
 
} // namespace Mantid::DataObjects