/** Executes the algorithm
*
* @throw Exception::FileError If the grouping file cannot be opened or read successfully
* @throw runtime_error If unable to run one of the Child Algorithms successfully
*/
void ReadGroupsFromFile::exec()
{
MatrixWorkspace_const_sptr ws = getProperty("InstrumentWorkspace");
// Get the instrument.
Instrument_const_sptr inst = ws->getInstrument();
// Create a copy (without the data) of the workspace - it will contain the
Workspace2D_sptr localWorkspace =
boost::dynamic_pointer_cast<Workspace2D>(WorkspaceFactory::Instance().create(ws, ws->getNumberHistograms(), 2, 1));
if (!localWorkspace)
throw std::runtime_error("Failed when creating a Workspace2D from the input!");
const std::string groupfile=getProperty("GroupingFilename");
if ( ! groupfile.empty() )
{
std::string filename(groupfile);
std::transform(filename.begin(), filename.end(), filename.begin(), tolower);
if ( filename.find(".xml") != std::string::npos )
{
readXMLGroupingFile(groupfile);
}
else
{
readGroupingFile(groupfile);
}
}
// Get the instrument.
const int64_t nHist=localWorkspace->getNumberHistograms();
// Determine whether the user wants to see unselected detectors or not
const std::string su=getProperty("ShowUnselected");
bool showunselected=(!su.compare("True"));
bool success=false;
for (int64_t i=0;i<nHist;i++)
{
ISpectrum * spec = localWorkspace->getSpectrum(i);
const std::set<detid_t> & dets = spec->getDetectorIDs();
if (dets.empty()) // Nothing
{
spec->dataY()[0]=0.0;
continue;
}
// Find the first detector ID in the list
calmap::const_iterator it=calibration.find(*dets.begin());
if (it==calibration.end()) //Could not find the detector
{
spec->dataY()[0]=0.0;
continue;
}
if (showunselected)
{
if (((*it).second).second==0)
spec->dataY()[0]=0.0;
else
spec->dataY()[0]=static_cast<double>(((*it).second).first);
}
else
spec->dataY()[0]=static_cast<double>(((*it).second).first);
if (!success) success=true; //At least one detector is found in the cal file
}
progress(1);
calibration.clear();
if (!success) //Do some cleanup
{
localWorkspace.reset();
throw std::runtime_error("Fail to found a detector in "+groupfile+" existing in instrument "+inst->getName());
}
setProperty("OutputWorkspace",localWorkspace);
return;
}
void GroupDetectors::exec()
{
// Get the input workspace
const MatrixWorkspace_sptr WS = getProperty("Workspace");
std::vector<size_t> indexList = getProperty("WorkspaceIndexList");
std::vector<specid_t> spectraList = getProperty("SpectraList");
const std::vector<detid_t> detectorList = getProperty("DetectorList");
// Could create a Validator to replace the below
if ( indexList.empty() && spectraList.empty() && detectorList.empty() )
{
g_log.information(name() +
": WorkspaceIndexList, SpectraList, and DetectorList properties are all empty, no grouping done");
return;
}
// Bin boundaries need to be the same, so check if they actually are
if (!API::WorkspaceHelpers::commonBoundaries(WS))
{
g_log.error("Can only group if the histograms have common bin boundaries");
throw std::runtime_error("Can only group if the histograms have common bin boundaries");
}
// If the spectraList property has been set, need to loop over the workspace looking for the
// appropriate spectra number and adding the indices they are linked to the list to be processed
if ( ! spectraList.empty() )
{
WS->getIndicesFromSpectra(spectraList,indexList);
}// End dealing with spectraList
else if ( ! detectorList.empty() )
{
// Dealing with DetectorList
//convert from detectors to workspace indices
WS->getIndicesFromDetectorIDs(detectorList, indexList);
}
if ( indexList.empty() )
{
g_log.warning("Nothing to group");
return;
}
const size_t vectorSize = WS->blocksize();
const specid_t firstIndex = static_cast<specid_t>(indexList[0]);
ISpectrum * firstSpectrum = WS->getSpectrum(firstIndex);
setProperty("ResultIndex",firstIndex);
// loop over the spectra to group
Progress progress(this, 0.0, 1.0, static_cast<int>(indexList.size()-1));
for (size_t i = 0; i < indexList.size()-1; ++i)
{
// The current spectrum
const size_t currentIndex = indexList[i+1];
ISpectrum * spec = WS->getSpectrum(currentIndex);
// Add the current detector to belong to the first spectrum
firstSpectrum->addDetectorIDs(spec->getDetectorIDs());
// Add up all the Y spectra and store the result in the first one
// Need to keep the next 3 lines inside loop for now until ManagedWorkspace mru-list works properly
MantidVec &firstY = WS->dataY(firstIndex);
MantidVec::iterator fYit;
MantidVec::iterator fEit = firstSpectrum->dataE().begin();
MantidVec::iterator Yit = spec->dataY().begin();
MantidVec::iterator Eit = spec->dataE().begin();
for (fYit = firstY.begin(); fYit != firstY.end(); ++fYit, ++fEit, ++Yit, ++Eit)
{
*fYit += *Yit;
// Assume 'normal' (i.e. Gaussian) combination of errors
*fEit = sqrt( (*fEit)*(*fEit) + (*Eit)*(*Eit) );
}
// Now zero the now redundant spectrum and set its spectraNo to indicate this (using -1)
// N.B. Deleting spectra would cause issues for ManagedWorkspace2D, hence the the approach taken here
spec->dataY().assign(vectorSize,0.0);
spec->dataE().assign(vectorSize,0.0);
spec->setSpectrumNo(-1);
spec->clearDetectorIDs();
progress.report();
}
}
