void setXValuesOn1DWorkspaceWithPointData(
Mantid::API::MatrixWorkspace_sptr workspace, double xmin, double xmax) {
auto &xValues = workspace->dataX(0);
auto size = xValues.size();
double binWidth = (xmax - xmin) / static_cast<double>(size - 1);
for (size_t index = 0; index < size; ++index) {
xValues[index] = xmin;
xmin += binWidth;
}
}
/**
* Sum counts in detectors for purposes of rough plotting against the units on the x-axis.
* Assumes that all spectra have different x vectors.
*
* @param dets :: A list of detector IDs to sum.
* @param x :: (output) Time of flight values (or whatever values the x axis has) to plot against.
* @param y :: (output) The sums of the counts for each bin.
* @param size :: (input) Size of the output vectors.
*/
void InstrumentActor::sumDetectorsRagged(QList<int> &dets, std::vector<double> &x, std::vector<double> &y, size_t size) const
{
if ( dets.isEmpty() || size == 0 )
{
x.clear();
y.clear();
return;
}
Mantid::API::MatrixWorkspace_const_sptr ws = getWorkspace();
// create a workspace to hold the data from the selected detectors
Mantid::API::MatrixWorkspace_sptr dws = Mantid::API::WorkspaceFactory::Instance().create(ws,dets.size());
// x-axis limits
double xStart = maxBinValue();
double xEnd = minBinValue();
size_t nSpec = 0; // number of actual spectra to add
// fill in the temp workspace with the data from the detectors
foreach(int id, dets)
{
try {
size_t index = getWorkspaceIndex( id );
dws->dataX(nSpec) = ws->readX(index);
dws->dataY(nSpec) = ws->readY(index);
dws->dataE(nSpec) = ws->readE(index);
double xmin = dws->readX(nSpec).front();
double xmax = dws->readX(nSpec).back();
if ( xmin < xStart )
{
xStart = xmin;
}
if ( xmax > xEnd )
{
xEnd = xmax;
}
++nSpec;
} catch (Mantid::Kernel::Exception::NotFoundError &) {
continue; // Detector doesn't have a workspace index relating to it
}
}
if ( nSpec == 0 )
{
x.clear();
y.clear();
return;
}
// limits should exceed the integration range
if ( xStart < minBinValue() )
{
xStart = minBinValue();
}
if ( xEnd > maxBinValue() )
{
xEnd = maxBinValue();
}
double dx = (xEnd - xStart) / static_cast<double>(size - 1);
std::string params = QString("%1,%2,%3").arg(xStart).arg(dx).arg(xEnd).toStdString();
std::string outName = "_TMP_sumDetectorsRagged";
try
{
// rebin all spectra to the same binning
Mantid::API::IAlgorithm * alg = Mantid::API::FrameworkManager::Instance().createAlgorithm("Rebin",-1);
alg->setProperty( "InputWorkspace", dws );
alg->setPropertyValue( "OutputWorkspace", outName );
alg->setPropertyValue( "Params", params );
alg->execute();
ws = boost::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(Mantid::API::AnalysisDataService::Instance().retrieve(outName));
Mantid::API::AnalysisDataService::Instance().remove( outName );
x = ws->readX(0);
y = ws->readY(0);
// add the spectra
for(size_t i = 0; i < nSpec; ++i)
{
const Mantid::MantidVec& Y = ws->readY(i);
std::transform( y.begin(), y.end(), Y.begin(), y.begin(), std::plus<double>() );
}
}
catch(std::invalid_argument&)
{
// wrong Params for any reason
x.resize(size,(xEnd + xStart)/2);
y.resize(size,0.0);
}
}
