Пример #1
0
/** Fits each spectrum in the workspace to f(x) = A * sin( w * x + p)
* @param ws :: [input] The workspace to fit
* @param freq :: [input] Hint for the frequency (w)
* @param groupName :: [input] The name of the output workspace group
* @param resTab :: [output] Table workspace storing the asymmetries and phases
* @param resGroup :: [output] Workspace group storing the fitting results
*/
void CalMuonDetectorPhases::fitWorkspace(const API::MatrixWorkspace_sptr &ws,
                                         double freq, std::string groupName,
                                         API::ITableWorkspace_sptr &resTab,
                                         API::WorkspaceGroup_sptr &resGroup) {

  int nhist = static_cast<int>(ws->getNumberHistograms());

  // Create the fitting function f(x) = A * sin ( w * x + p )
  // The same function and initial parameters are used for each fit
  std::string funcStr = createFittingFunction(freq, true);

  // Set up results table
  resTab->addColumn("int", "Spectrum number");
  resTab->addColumn("double", "Asymmetry");
  resTab->addColumn("double", "Phase");

  // Loop through fitting all spectra individually
  const static std::string success = "success";
  for (int wsIndex = 0; wsIndex < nhist; wsIndex++) {
    reportProgress(wsIndex, nhist);
    auto fit = createChildAlgorithm("Fit");
    fit->initialize();
    fit->setPropertyValue("Function", funcStr);
    fit->setProperty("InputWorkspace", ws);
    fit->setProperty("WorkspaceIndex", wsIndex);
    fit->setProperty("CreateOutput", true);
    fit->setPropertyValue("Output", groupName);
    fit->execute();

    std::string status = fit->getProperty("OutputStatus");
    if (!fit->isExecuted() || status != success) {
      std::ostringstream error;
      error << "Fit failed for spectrum at workspace index " << wsIndex;
      error << ": " << status;
      throw std::runtime_error(error.str());
    }

    API::MatrixWorkspace_sptr fitOut = fit->getProperty("OutputWorkspace");
    resGroup->addWorkspace(fitOut);
    API::ITableWorkspace_sptr tab = fit->getProperty("OutputParameters");
    // Now we have our fitting results stored in tab
    // but we need to extract the relevant information, i.e.
    // the detector phases (parameter 'p') and asymmetries ('A')
    const auto &spectrum = ws->getSpectrum(static_cast<size_t>(wsIndex));
    extractDetectorInfo(tab, resTab, spectrum.getSpectrumNo());
  }
}
Пример #2
0
    /** This method loops through the response return_vector and saves the datasets details to a table workspace
     * @param response :: const reference to response object
     * @param outputws ::  shred pointer to workspace
     * @returns shared pointer to table workspace which stores the data
     */
    void  CICatHelper::saveDataSets(const ns1__getInvestigationIncludesResponse& response,API::ITableWorkspace_sptr& outputws)
    {
      //create table workspace
      if (outputws->getColumnNames().empty())
      {
        outputws->addColumn("str","Name");//File name
        outputws->addColumn("str","Status");
        outputws->addColumn("str","Type");
        outputws->addColumn("str","Description");
        outputws->addColumn("long64","Sample Id");
      }
      try
      {

        std::vector<ns1__dataset*> datasetVec;
        datasetVec.assign((response.return_)->datasetCollection.begin(),(response.return_)->datasetCollection.end());

        std::vector<ns1__dataset*>::const_iterator dataset_citr;
        for(dataset_citr=datasetVec.begin();dataset_citr!=datasetVec.end();++dataset_citr)
        {
          API::TableRow t = outputws->appendRow();

          // DataSet Name
          savetoTableWorkspace((*dataset_citr)->name,t);
          // DataSet Status
          savetoTableWorkspace((*dataset_citr)->datasetStatus,t);
          //DataSet Type
          savetoTableWorkspace((*dataset_citr)->datasetType,t);
          //DataSet Type
          savetoTableWorkspace((*dataset_citr)->description,t);
          //DataSet Type
          savetoTableWorkspace((*dataset_citr)->sampleId,t);
        }
      }

      catch(std::runtime_error& )
      {
        throw;
      }

      //return outputws;
    }
Пример #3
0
/** This method saves the search response( investigations )data to a table
 * workspace
 *  @param response :: const reference to response object
 *  @param outputws :: shared pointer to output workspace
 */
void CICatHelper::saveSearchRessults(
    const ns1__searchByAdvancedPaginationResponse &response,
    API::ITableWorkspace_sptr &outputws) {
  if (outputws->getColumnNames().empty()) {
    outputws->addColumn("str", "Investigation id");
    outputws->addColumn("str", "Facility");
    outputws->addColumn("str", "Title");
    outputws->addColumn("str", "Instrument");
    outputws->addColumn("str", "Run range");
    outputws->addColumn("str", "Start date");
    outputws->addColumn("str", "End date");
    outputws->addColumn("str", "SessionID");
  }
  saveInvestigations(response.return_, outputws);
}
Пример #4
0
/**
   Read from the instrument file the dead wires and store the information in a TableWorkspace.
   If asked, the dead wires are removed from the data set.

   @param localWorkspace :: input raw data workspace, containing the information about the instrument
   @param outputws :: input dead wire liste workspace
  */
void PoldiRemoveDeadWires::runExcludWires3
(
    DataObjects::Workspace2D_sptr &localWorkspace,
    API::ITableWorkspace_sptr &outputws
)
{
    outputws->addColumn("int","DeadWires");

    boost::shared_ptr<const Mantid::Geometry::IComponent> comp = localWorkspace->getInstrument()->getComponentByName("holder");
    boost::shared_ptr<const Mantid::Geometry::ICompAssembly> bank = boost::dynamic_pointer_cast<const Mantid::Geometry::ICompAssembly>(comp);
    if (bank)
    {
        // Get a vector of children (recursively)
        std::vector<boost::shared_ptr<const Mantid::Geometry::IComponent> > children;
        bank->getChildren(children, true);

        std::vector<double> defaultDeadWires;
        int ewLine = 0;

        for (unsigned int it = 0; it < children.size(); ++it)
        {
            string wireName = children.at(it)->getName();
            std::vector<boost::shared_ptr<const Mantid::Geometry::IComponent> > tyty =
                localWorkspace.get()->getInstrument().get()->getAllComponentsWithName(wireName);

            std::vector<double> tempWire = tyty[0]->getNumberParameter("excluded");
            if(tempWire.size()>0) {
                int val = (int)tempWire[0];
                g_log.debug() << "_poldi : dead wires :" << val <<  std::endl;
                defaultDeadWires.push_back(val);
                for(unsigned int j=0; j<m_channelsPerSpectrum; j++) {
                    localWorkspace->maskBin(val-1,j,1);
                }
                ewLine++;


                TableRow t = outputws->appendRow();
                t << val ;

            }
        }
        g_log.information() << "_poldi : dead wires set to 0 (nb:" << ewLine << ")" <<  std::endl;
        setProperty("nbExcludedWires",ewLine);
    } else {
        g_log.information() << "_poldi : no dead wire removed" <<  std::endl;
    }
}
Пример #5
0
/**
 * Saves result from "getDataFiles" to workspace.
 * @param response :: result response from the catalog.
 * @param outputws :: shared pointer to datasets
 */
void ICat4Catalog::saveDataFiles(std::vector<xsd__anyType *> response,
                                 API::ITableWorkspace_sptr &outputws) {
  if (outputws->getColumnNames().empty()) {
    // Add rows headers to the output workspace.
    outputws->addColumn("str", "Name");
    outputws->addColumn("str", "Location");
    outputws->addColumn("str", "Create Time");
    outputws->addColumn("long64", "Id");
    outputws->addColumn("long64", "File size(bytes)");
    outputws->addColumn("str", "File size");
    outputws->addColumn("str", "Description");
  }

  std::vector<xsd__anyType *>::const_iterator iter;
  for (iter = response.begin(); iter != response.end(); ++iter) {
    ns1__datafile *datafile = dynamic_cast<ns1__datafile *>(*iter);
    if (datafile) {
      API::TableRow table = outputws->appendRow();
      // Now add the relevant investigation data to the table.
      savetoTableWorkspace(datafile->name, table);
      savetoTableWorkspace(datafile->location, table);

      std::string createDate =
          formatDateTime(*datafile->createTime, "%Y-%m-%d %H:%M:%S");
      savetoTableWorkspace(&createDate, table);

      savetoTableWorkspace(datafile->id, table);
      savetoTableWorkspace(datafile->fileSize, table);

      std::string fileSize = bytesToString(*datafile->fileSize);
      savetoTableWorkspace(&fileSize, table);

      if (datafile->description)
        savetoTableWorkspace(datafile->description, table);
    } else {
      throw std::runtime_error("ICat4Catalog::saveDataFiles expected a "
                               "datafile. Please contact the Mantid "
                               "development team.");
    }
  }
}
Пример #6
0
/**
 * Loops through the response vector and saves the datasets details to a table
 * workspace.
 * @param response :: A vector containing the results of the search query.
 * @param outputws :: Shared pointer to output workspace.
 */
void ICat4Catalog::saveDataSets(std::vector<xsd__anyType *> response,
                                API::ITableWorkspace_sptr &outputws) {
  if (outputws->getColumnNames().empty()) {
    // Add rows headers to the output workspace.
    outputws->addColumn("long64", "ID");
    outputws->addColumn("str", "Name");
    outputws->addColumn("str", "Description");
    outputws->addColumn("str", "Type");
    outputws->addColumn("str", "Related investigation ID");
    outputws->addColumn("size_t", "Number of datafiles");
  }

  std::string emptyCell;
  for (auto &iter : response) {
    ns1__dataset *dataset = dynamic_cast<ns1__dataset *>(iter);
    if (dataset) {
      API::TableRow table = outputws->appendRow();

      savetoTableWorkspace(dataset->id, table);
      savetoTableWorkspace(dataset->name, table);

      if (dataset->description)
        savetoTableWorkspace(dataset->description, table);
      else
        savetoTableWorkspace(&emptyCell, table);

      if (dataset->type)
        savetoTableWorkspace(dataset->type->name, table);
      else
        savetoTableWorkspace(&emptyCell, table);

      if (dataset->investigation)
        savetoTableWorkspace(dataset->investigation->name, table);
      else
        savetoTableWorkspace(&emptyCell, table);

      size_t datafileCount = dataset->datafiles.size();
      savetoTableWorkspace(&datafileCount, table);
    } else {
      throw std::runtime_error("ICat4Catalog::saveDataSets expected a dataset. "
                               "Please contact the Mantid development team.");
    }
  }
}
Пример #7
0
/**
 * Load a table
 */
API::Workspace_sptr LoadNexusProcessed::loadTableEntry(NXEntry & entry)
{
  API::ITableWorkspace_sptr workspace;
  workspace = Mantid::API::WorkspaceFactory::Instance().createTable("TableWorkspace");

  NXData nx_tw = entry.openNXData("table_workspace");

  std::vector<double> values;

  bool hasNumberOfRowBeenSet = false;
  //int numberOfRows = 0;

  int columnNumber = 1;
  do
  {
    std::string str = "column_" + boost::lexical_cast<std::string>(columnNumber);

    NXInfo info = nx_tw.getDataSetInfo(str.c_str());
    if (info.stat == NX_ERROR)
    {
      break;
    }

    if ( info.type == NX_FLOAT64 )
    {
      NXDouble nxDouble = nx_tw.openNXDouble(str.c_str());
      std::string columnTitle = nxDouble.attributes("name");
      if (!columnTitle.empty())
      {
        workspace->addColumn("double", columnTitle);
        nxDouble.load();
        int length = nxDouble.dim0();
        if ( !hasNumberOfRowBeenSet )
        { 
          workspace->setRowCount(length);
          hasNumberOfRowBeenSet = true;
        }
        for (int i = 0; i < length; i++)
          workspace->cell<double>(i,columnNumber-1) = *(nxDouble() + i);
      }
    }
    else if ( info.type == NX_CHAR )
    {
      NXChar data = nx_tw.openNXChar(str.c_str());
      std::string columnTitle = data.attributes("name");
      if (!columnTitle.empty())
      {
        workspace->addColumn("str", columnTitle);
        int nRows = info.dims[0];
        if ( !hasNumberOfRowBeenSet )
        {
          workspace->setRowCount(nRows);
          hasNumberOfRowBeenSet = true;
        }
        int maxStr = info.dims[1];

        std::string fromCrap(maxStr,' ');

        data.load();
        for (int iR = 0; iR < nRows; iR++)
        {
          for (int i = 0; i < maxStr; i++)
            fromCrap[i] = *(data()+i+maxStr*iR);
          workspace->cell<std::string>(iR,columnNumber-1) = fromCrap;
        }
      }
    } 

    columnNumber++;
  
  } while ( 1 );

  return boost::static_pointer_cast<API::Workspace>(workspace);
}
Пример #8
0
/**
 * This method loops through the response return_vector and saves the datafile
 * details to a table workspace
 * @param response :: const reference to response object
 * @param outputws :: shared pointer to table workspace which stores the data
 */
void CICatHelper::saveInvestigationIncludesResponse(
    const ns1__getInvestigationIncludesResponse &response,
    API::ITableWorkspace_sptr &outputws) {
  if (outputws->getColumnNames().empty()) {
    outputws->addColumn("str", "Name");
    outputws->addColumn("str", "Location");
    outputws->addColumn("str", "Create Time");
    outputws->addColumn("long64", "Id");
    outputws->addColumn("long64", "File size(bytes)");
    outputws->addColumn("str", "File size");
    outputws->addColumn("str", "Description");
  }

  try {
    std::vector<ns1__dataset *> datasetVec;
    datasetVec.assign((response.return_)->datasetCollection.begin(),
                      (response.return_)->datasetCollection.end());
    if (datasetVec.empty()) {
      throw std::runtime_error("No data files exists in the ICAT database for "
                               "the selected investigation");
    }
    std::vector<ns1__dataset *>::const_iterator dataset_citr;
    for (dataset_citr = datasetVec.begin(); dataset_citr != datasetVec.end();
         ++dataset_citr) {
      std::vector<ns1__datafile *> datafileVec;
      datafileVec.assign((*dataset_citr)->datafileCollection.begin(),
                         (*dataset_citr)->datafileCollection.end());
      if (datafileVec.empty()) {
        throw std::runtime_error("No data files exists in the ICAT database "
                                 "for the selected  investigation ");
      }

      std::vector<ns1__datafile *>::const_iterator datafile_citr;
      for (datafile_citr = datafileVec.begin();
           datafile_citr != datafileVec.end(); ++datafile_citr) {

        API::TableRow t = outputws->appendRow();

        // File Name
        savetoTableWorkspace((*datafile_citr)->name, t);
        savetoTableWorkspace((*datafile_citr)->location, t);

        // File creation Time.
        std::string *creationtime = nullptr;
        if ((*datafile_citr)->datafileCreateTime != nullptr) {
          time_t crtime = *(*datafile_citr)->datafileCreateTime;
          char temp[25];
          strftime(temp, 25, "%Y-%b-%d %H:%M:%S", localtime(&crtime));
          std::string ftime(temp);
          creationtime = new std::string;
          creationtime->assign(ftime);
        }
        savetoTableWorkspace(creationtime, t);
        if (creationtime)
          delete creationtime;

        //
        savetoTableWorkspace((*datafile_citr)->id, t);

        LONG64 fileSize =
            boost::lexical_cast<LONG64>(*(*datafile_citr)->fileSize);
        savetoTableWorkspace(&fileSize, t);

        savetoTableWorkspace((*datafile_citr)->description, t);
      }
    }

  } catch (std::runtime_error &) {
    throw;
  }
}
/** Fits each spectrum in the workspace to f(x) = A * sin( w * x + p)
 * @param ws :: [input] The workspace to fit
 * @param freq :: [input] Hint for the frequency (w)
 * @param groupName :: [input] The name of the output workspace group
 * @param resTab :: [output] Table workspace storing the asymmetries and phases
 * @param resGroup :: [output] Workspace group storing the fitting results
 */
void CalMuonDetectorPhases::fitWorkspace(const API::MatrixWorkspace_sptr &ws,
                                         double freq, std::string groupName,
                                         API::ITableWorkspace_sptr resTab,
                                         API::WorkspaceGroup_sptr &resGroup) {

  int nhist = static_cast<int>(ws->getNumberHistograms());

  // Create the fitting function f(x) = A * sin ( w * x + p )
  // The same function and initial parameters are used for each fit
  std::string funcStr = createFittingFunction(freq, true);

  // Set up results table
  resTab->addColumn("int", "Spectrum number");
  resTab->addColumn("double", "Asymmetry");
  resTab->addColumn("double", "Phase");

  const auto &indexInfo = ws->indexInfo();

  // Loop through fitting all spectra individually
  const static std::string success = "success";
  for (int wsIndex = 0; wsIndex < nhist; wsIndex++) {
    reportProgress(wsIndex, nhist);
    const auto &yValues = ws->y(wsIndex);
    auto emptySpectrum = std::all_of(yValues.begin(), yValues.end(),
                                     [](double value) { return value == 0.; });
    if (emptySpectrum) {
      g_log.warning("Spectrum " + std::to_string(wsIndex) + " is empty");
      TableWorkspace_sptr tab = boost::make_shared<TableWorkspace>();
      tab->addColumn("str", "Name");
      tab->addColumn("double", "Value");
      tab->addColumn("double", "Error");
      for (int j = 0; j < 4; j++) {
        API::TableRow row = tab->appendRow();
        if (j == PHASE_ROW) {
          row << "dummy" << 0.0 << 0.0;
        } else {
          row << "dummy" << ASYMM_ERROR << 0.0;
        }
      }

      extractDetectorInfo(*tab, *resTab, indexInfo.spectrumNumber(wsIndex));

    } else {
      auto fit = createChildAlgorithm("Fit");
      fit->initialize();
      fit->setPropertyValue("Function", funcStr);
      fit->setProperty("InputWorkspace", ws);
      fit->setProperty("WorkspaceIndex", wsIndex);
      fit->setProperty("CreateOutput", true);
      fit->setPropertyValue("Output", groupName);
      fit->execute();

      std::string status = fit->getProperty("OutputStatus");
      if (!fit->isExecuted()) {
        std::ostringstream error;
        error << "Fit failed for spectrum at workspace index " << wsIndex;
        error << ": " << status;
        throw std::runtime_error(error.str());
      } else if (status != success) {
        g_log.warning("Fit failed for spectrum at workspace index " +
                      std::to_string(wsIndex) + ": " + status);
      }

      API::MatrixWorkspace_sptr fitOut = fit->getProperty("OutputWorkspace");
      resGroup->addWorkspace(fitOut);
      API::ITableWorkspace_sptr tab = fit->getProperty("OutputParameters");
      // Now we have our fitting results stored in tab
      // but we need to extract the relevant information, i.e.
      // the detector phases (parameter 'p') and asymmetries ('A')
      extractDetectorInfo(*tab, *resTab, indexInfo.spectrumNumber(wsIndex));
    }
  }
}
Пример #10
0
/**
 * Calculates the EISF if the fit includes a Delta function
 * @param tableWs - The TableWorkspace to append the EISF calculation to
 */
void ConvolutionFitSequential::calculateEISF(
    API::ITableWorkspace_sptr &tableWs) {
  // Get height data from parameter table
  const auto columns = tableWs->getColumnNames();
  const auto height = searchForFitParams("Height", columns).at(0);
  const auto heightErr = searchForFitParams("Height_Err", columns).at(0);
  auto heightY = tableWs->getColumn(height)->numeric_fill<>();
  auto heightE = tableWs->getColumn(heightErr)->numeric_fill<>();

  // Get amplitude column names
  const auto ampNames = searchForFitParams("Amplitude", columns);
  const auto ampErrorNames = searchForFitParams("Amplitude_Err", columns);

  // For each lorentzian, calculate EISF
  size_t maxSize = ampNames.size();
  if (ampErrorNames.size() > maxSize) {
    maxSize = ampErrorNames.size();
  }
  for (size_t i = 0; i < maxSize; i++) {
    // Get amplitude from column in table workspace
    const auto ampName = ampNames.at(i);
    auto ampY = tableWs->getColumn(ampName)->numeric_fill<>();
    const auto ampErrorName = ampErrorNames.at(i);
    auto ampErr = tableWs->getColumn(ampErrorName)->numeric_fill<>();

    // Calculate EISF and EISF error
    // total = heightY + ampY
    auto total = cloneVector(heightY);
    std::transform(total.begin(), total.end(), ampY.begin(), total.begin(),
                   std::plus<double>());
    // eisfY = heightY / total
    auto eisfY = cloneVector(heightY);
    std::transform(eisfY.begin(), eisfY.end(), total.begin(), eisfY.begin(),
                   std::divides<double>());
    // heightE squared
    auto heightESq = cloneVector(heightE);
    heightESq = squareVector(heightESq);
    // ampErr squared
    auto ampErrSq = cloneVector(ampErr);
    ampErrSq = squareVector(ampErrSq);
    // totalErr = heightE squared + ampErr squared
    auto totalErr = cloneVector(heightESq);
    std::transform(totalErr.begin(), totalErr.end(), ampErrSq.begin(),
                   totalErr.begin(), std::plus<double>());
    // heightY squared
    auto heightYSq = cloneVector(heightY);
    heightYSq = squareVector(heightYSq);
    // total Squared
    auto totalSq = cloneVector(total);
    totalSq = squareVector(totalSq);
    // errOverTotalSq = totalErr / total squared
    auto errOverTotalSq = cloneVector(totalErr);
    std::transform(errOverTotalSq.begin(), errOverTotalSq.end(),
                   totalSq.begin(), errOverTotalSq.begin(),
                   std::divides<double>());
    // heightESqOverYSq = heightESq / heightYSq
    auto heightESqOverYSq = cloneVector(heightESq);
    std::transform(heightESqOverYSq.begin(), heightESqOverYSq.end(),
                   heightYSq.begin(), heightESqOverYSq.begin(),
                   std::divides<double>());
    // sqrtESqOverYSq = squareRoot( heightESqOverYSq )
    auto sqrtESqOverYSq = cloneVector(heightESqOverYSq);
    std::transform(sqrtESqOverYSq.begin(), sqrtESqOverYSq.end(),
                   sqrtESqOverYSq.begin(),
                   static_cast<double (*)(double)>(sqrt));
    // eisfYSumRoot = eisfY * sqrtESqOverYSq
    auto eisfYSumRoot = cloneVector(eisfY);
    std::transform(eisfYSumRoot.begin(), eisfYSumRoot.end(),
                   sqrtESqOverYSq.begin(), eisfYSumRoot.begin(),
                   std::multiplies<double>());
    // eisfErr = eisfYSumRoot + errOverTotalSq
    auto eisfErr = cloneVector(eisfYSumRoot);
    std::transform(eisfErr.begin(), eisfErr.end(), errOverTotalSq.begin(),
                   eisfErr.begin(), std::plus<double>());

    // Append the calculated values to the table workspace
    auto columnName =
        ampName.substr(0, (ampName.size() - std::string("Amplitude").size()));
    columnName += "EISF";
    auto errorColumnName = ampErrorName.substr(
        0, (ampErrorName.size() - std::string("Amplitude_Err").size()));
    errorColumnName += "EISF_Err";

    tableWs->addColumn("double", columnName);
    tableWs->addColumn("double", errorColumnName);
    size_t maxEisf = eisfY.size();
    if (eisfErr.size() > maxEisf) {
      maxEisf = eisfErr.size();
    }

    Column_sptr col = tableWs->getColumn(columnName);
    Column_sptr errCol = tableWs->getColumn(errorColumnName);
    for (size_t j = 0; j < maxEisf; j++) {
      col->cell<double>(j) = eisfY.at(j);
      errCol->cell<double>(j) = eisfErr.at(j);
    }
  }
}
Пример #11
0
/**
 * Saves investigations to a table workspace.
 * @param response :: A vector containing the results of the search query.
 * @param outputws :: Shared pointer to output workspace.
 */
void ICat4Catalog::saveInvestigations(std::vector<xsd__anyType *> response,
                                      API::ITableWorkspace_sptr &outputws) {
  if (outputws->getColumnNames().empty()) {
    // Add rows headers to the output workspace.
    outputws->addColumn("long64", "DatabaseID");
    outputws->addColumn("str", "InvestigationID");
    outputws->addColumn("str", "Facility");
    outputws->addColumn("str", "Title");
    outputws->addColumn("str", "Instrument");
    outputws->addColumn("str", "Run range");
    outputws->addColumn("str", "Start date");
    outputws->addColumn("str", "End date");
    outputws->addColumn("str", "SessionID");
  }

  // Add data to each row in the output workspace.
  std::vector<xsd__anyType *>::const_iterator iter;
  for (iter = response.begin(); iter != response.end(); ++iter) {
    // Cast from xsd__anyType to subclass (xsd__string).
    ns1__investigation *investigation =
        dynamic_cast<ns1__investigation *>(*iter);
    if (investigation) {
      API::TableRow table = outputws->appendRow();
      // Used to insert an empty string into the cell if value does not exist.
      std::string emptyCell;

      // Now add the relevant investigation data to the table (They always
      // exist).
      savetoTableWorkspace(investigation->id, table);
      savetoTableWorkspace(investigation->name, table);
      savetoTableWorkspace(investigation->facility->name, table);
      savetoTableWorkspace(investigation->title, table);
      savetoTableWorkspace(
          investigation->investigationInstruments.at(0)->instrument->name,
          table);

      // Verify that the run parameters vector exist prior to doing anything.
      // Since some investigations may not have run parameters.
      if (!investigation->parameters.empty()) {
        savetoTableWorkspace(investigation->parameters[0]->stringValue, table);
      } else {
        savetoTableWorkspace(&emptyCell, table);
      }

      // Again, we need to check first if start and end date exist prior to
      // insertion.
      if (investigation->startDate) {
        std::string startDate =
            formatDateTime(*investigation->startDate, "%Y-%m-%d");
        savetoTableWorkspace(&startDate, table);
      } else {
        savetoTableWorkspace(&emptyCell, table);
      }

      if (investigation->endDate) {
        std::string endDate =
            formatDateTime(*investigation->endDate, "%Y-%m-%d");
        savetoTableWorkspace(&endDate, table);
      } else {
        savetoTableWorkspace(&emptyCell, table);
      }
      std::string sessionID = m_session->getSessionId();
      savetoTableWorkspace(&sessionID, table);
    } else {
      throw std::runtime_error("ICat4Catalog::saveInvestigations expected an "
                               "investigation. Please contact the Mantid "
                               "development team.");
    }
  }
}