MatrixWorkspace_sptr
PolarizationCorrection::copyShapeAndFill(MatrixWorkspace_sptr &base,
const double &value) {
MatrixWorkspace_sptr wsTemplate = WorkspaceFactory::Instance().create(base);
// Copy the x-array across to the new workspace.
for (size_t i = 0; i < wsTemplate->getNumberHistograms(); ++i) {
wsTemplate->setX(i, base->refX(i));
}
auto zeroed = this->multiply(wsTemplate, 0);
auto filled = this->add(zeroed, value);
return filled;
}
void IQTransform::exec()
{
MatrixWorkspace_sptr inputWS = getProperty("InputWorkspace");
// Print a warning if the input workspace has more than one spectrum
if ( inputWS->getNumberHistograms() > 1 )
{
g_log.warning("This algorithm is intended for use on single-spectrum workspaces.\n"
"Only the first spectrum will be transformed.");
}
// Do background subtraction from a workspace first because it doesn't like
// potential conversion to point data that follows. Requires a temporary workspace.
MatrixWorkspace_sptr tmpWS;
MatrixWorkspace_sptr backgroundWS = getProperty("BackgroundWorkspace");
if ( backgroundWS ) tmpWS = subtractBackgroundWS(inputWS,backgroundWS);
else tmpWS = inputWS;
// Create the output workspace
const size_t length = tmpWS->blocksize();
MatrixWorkspace_sptr outputWS = WorkspaceFactory::Instance().create(inputWS,1,length,length);
m_label->setLabel("");
outputWS->setYUnit("");
// Copy the data over. Assume single spectrum input (output will be).
// Take the mid-point of histogram bins
if ( tmpWS->isHistogramData() )
{
VectorHelper::convertToBinCentre(tmpWS->readX(0),outputWS->dataX(0));
}
else
{
outputWS->setX(0,tmpWS->refX(0));
}
MantidVec& Y = outputWS->dataY(0) = tmpWS->dataY(0);
outputWS->dataE(0) = tmpWS->dataE(0);
// Subtract a constant background if requested
const double background = getProperty("BackgroundValue");
if ( background > 0.0 ) subtractBackgroundValue(Y,background);
// Select the desired transformation function and call it
TransformFunc f = m_transforms.find(getProperty("TransformType"))->second;
(this->*f)(outputWS);
// Need the generic label unit on this (unless the unit on the X axis hasn't changed)
if ( ! m_label->caption().empty() ) outputWS->getAxis(0)->unit() = m_label;
setProperty("OutputWorkspace",outputWS);
}
//----------------------------------------------------------------------------------------------
/// @copydoc Mantid::API::Algorithm::exec()
void ResetNegatives::exec()
{
MatrixWorkspace_sptr inputWS = this->getProperty("InputWorkspace");
MatrixWorkspace_sptr outputWS = this->getProperty("OutputWorkspace");
// get the minimum for each spectrum
IAlgorithm_sptr alg = this->createChildAlgorithm("Min", 0., .1);
alg->setProperty<MatrixWorkspace_sptr>("InputWorkspace", inputWS);
alg->executeAsChildAlg();
MatrixWorkspace_const_sptr minWS = alg->getProperty("OutputWorkspace");
// determine if there is anything to do
int64_t nHist = static_cast<int64_t>(minWS->getNumberHistograms());
bool hasNegative = false;
for (int64_t i = 0; i < nHist; i++)
{
if (minWS->readY(i)[0] < 0)
{
hasNegative = true;
}
break;
}
// get out early if there is nothing to do
if (!hasNegative)
{
g_log.information() << "No values are negative. Copying InputWorkspace to OutputWorkspace\n";
if (inputWS != outputWS)
{
IAlgorithm_sptr alg = this->createChildAlgorithm("CloneWorkspace", .1, 1.);
alg->setProperty<Workspace_sptr>("InputWorkspace", inputWS);
alg->executeAsChildAlg();
Workspace_sptr temp = alg->getProperty("OutputWorkspace");
setProperty("OutputWorkspace", boost::dynamic_pointer_cast<MatrixWorkspace>(temp));
}
return;
}
// sort the event list to make it fast and thread safe
DataObjects::EventWorkspace_const_sptr eventWS
= boost::dynamic_pointer_cast<const DataObjects::EventWorkspace>( inputWS );
if (eventWS)
eventWS->sortAll(DataObjects::TOF_SORT, NULL);
Progress prog(this, .1, 1., 2*nHist);
// generate output workspace - copy X and dY
outputWS = API::WorkspaceFactory::Instance().create(inputWS);
PARALLEL_FOR2(inputWS,outputWS)
for (int64_t i = 0; i < nHist; i++)
{
PARALLEL_START_INTERUPT_REGION
outputWS->dataY(i) = inputWS->readY(i);
outputWS->dataE(i) = inputWS->readE(i);
outputWS->setX(i, inputWS->refX(i)); // share the pointer more
prog.report();
PARALLEL_END_INTERUPT_REGION
}
PARALLEL_CHECK_INTERUPT_REGION
// do the actual work
if (this->getProperty("AddMinimum"))
{
this->pushMinimum(minWS, outputWS, prog);
}
else
{
this->changeNegatives(minWS, this->getProperty("ResetValue"), outputWS, prog);
}
setProperty("OutputWorkspace",outputWS);
}
