Example #1
0
/** Compare the dimensions etc. of two MDWorkspaces
*/
void CompareMDWorkspaces::compareMDHistoWorkspaces(
    Mantid::DataObjects::MDHistoWorkspace_sptr ws1,
    Mantid::DataObjects::MDHistoWorkspace_sptr ws2) {
    compare(ws1->getNumDims(), ws2->getNumDims(),
            "Workspaces have a different number of dimensions");
    compare(ws1->getNPoints(), ws2->getNPoints(),
            "Workspaces have a different number of points");
    for (size_t i = 0; i < ws1->getNPoints(); i++) {
        double diff = fabs(ws1->getSignalAt(i) - ws2->getSignalAt(i));
        if (diff > m_tolerance)
            throw CompareFailsException(
                "MDHistoWorkspaces have a different signal at index " +
                Strings::toString(i) + " " +
                versus(ws1->getSignalAt(i), ws2->getSignalAt(i)));

        double diffErr = fabs(ws1->getErrorAt(i) - ws2->getErrorAt(i));
        if (diffErr > m_tolerance)
            throw CompareFailsException(
                "MDHistoWorkspaces have a different error at index " +
                Strings::toString(i) + " " +
                versus(ws1->getErrorAt(i), ws2->getErrorAt(i)));
    }
}
Example #2
0
/** Save a MDHistoWorkspace to a .nxs file
 *
 * @param ws :: MDHistoWorkspace to save
 */
void SaveMD::doSaveHisto(Mantid::DataObjects::MDHistoWorkspace_sptr ws) {
  std::string filename = getPropertyValue("Filename");

  // Erase the file if it exists
  Poco::File oldFile(filename);
  if (oldFile.exists())
    oldFile.remove();

  // Create a new file in HDF5 mode.
  ::NeXus::File *file;
  file = new ::NeXus::File(filename, NXACC_CREATE5);

  // The base entry. Named so as to distinguish from other workspace types.
  file->makeGroup("MDHistoWorkspace", "NXentry", true);

  // Write out the coordinate system
  file->writeData("coordinate_system",
                  static_cast<uint32_t>(ws->getSpecialCoordinateSystem()));

  // Write out the set display normalization
  file->writeData("visual_normalization",
                  static_cast<uint32_t>(ws->displayNormalization()));

  // Save the algorithm history under "process"
  ws->getHistory().saveNexus(file);

  // Save all the ExperimentInfos
  for (uint16_t i = 0; i < ws->getNumExperimentInfo(); i++) {
    ExperimentInfo_sptr ei = ws->getExperimentInfo(i);
    std::string groupName = "experiment" + Strings::toString(i);
    if (ei) {
      // Can't overwrite entries. Just add the new ones
      file->makeGroup(groupName, "NXgroup", true);
      file->putAttr("version", 1);
      ei->saveExperimentInfoNexus(file);
      file->closeGroup();
    }
  }

  // Write out some general information like # of dimensions
  file->writeData("dimensions", int32_t(ws->getNumDims()));

  // Save each dimension, as their XML representation
  for (size_t d = 0; d < ws->getNumDims(); d++) {
    std::ostringstream mess;
    mess << "dimension" << d;
    file->putAttr(mess.str(), ws->getDimension(d)->toXMLString());
  }

  // Write out the affine matrices
  MDBoxFlatTree::saveAffineTransformMatricies(
      file, boost::dynamic_pointer_cast<const IMDWorkspace>(ws));

  // Check that the typedef has not been changed. The NeXus types would need
  // changing if it does!
  assert(sizeof(signal_t) == sizeof(double));

  // Number of data points
  int nPoints = static_cast<int>(ws->getNPoints());

  file->makeData("signal", ::NeXus::FLOAT64, nPoints, true);
  file->putData(ws->getSignalArray());
  file->closeData();

  file->makeData("errors_squared", ::NeXus::FLOAT64, nPoints, true);
  file->putData(ws->getErrorSquaredArray());
  file->closeData();

  file->makeData("num_events", ::NeXus::FLOAT64, nPoints, true);
  file->putData(ws->getNumEventsArray());
  file->closeData();

  file->makeData("mask", ::NeXus::INT8, nPoints, true);
  file->putData(ws->getMaskArray());
  file->closeData();

  // TODO: Links to original workspace???

  file->closeGroup();
  file->close();
}