/**
* Constructs a title using the unicode methods of the UnitLabel
* @param workspace The workspace containing the Y title information
* @param plottingDistribution If true, the Y axis has been divided by the bin
* width
*/
void PlotAxis::titleFromYData(const Mantid::API::MatrixWorkspace &workspace,
const bool plottingDistribution) {
// The workspace can have a custom label so we should use that as a
// preference.
// The workspace.YUnitLabel does some mangling of the string if the user set
// no
// custom label. See MatrixWorkspace::YUnitLabel
const std::string customLabel = workspace.YUnitLabel();
const std::string yunit = workspace.YUnit();
if ((yunit == customLabel) ||
(customLabel.find("per") != std::string::npos)) {
m_title = QString::fromStdString(yunit);
if (plottingDistribution && workspace.axes() > 0 &&
workspace.getAxis(0)->unit()) {
const auto xunit = workspace.getAxis(0)->unit();
const auto lbl = xunit->label();
if (!lbl.utf8().empty()) {
m_title += " (" + QString::fromStdWString(lbl.utf8()) + ")" +
QString::fromWCharArray(L"\u207b\u00b9");
}
}
} else {
m_title = QString::fromStdString(customLabel);
}
}
/**
* @brief Extract Q values from vertical dimension of the workspace, or compute
* them.
* @param workspace workspace possibly containing Q values.
*/
std::vector<double> FunctionQDepends::extractQValues(
const Mantid::API::MatrixWorkspace &workspace) {
std::vector<double> qs;
// Check if the vertical axis has units of momentum transfer, then extract Q
// values...
auto axis_ptr =
dynamic_cast<Mantid::API::NumericAxis *>(workspace.getAxis(1));
if (axis_ptr) {
const boost::shared_ptr<Kernel::Unit> &unit_ptr = axis_ptr->unit();
if (unit_ptr->unitID() == "MomentumTransfer") {
qs = axis_ptr->getValues();
}
}
// ...otherwise, compute the momentum transfer for each spectrum, if possible
else {
const auto &spectrumInfo = workspace.spectrumInfo();
size_t numHist = workspace.getNumberHistograms();
for (size_t wi = 0; wi < numHist; wi++) {
if (spectrumInfo.hasDetectors(wi)) {
const auto detID = spectrumInfo.detector(wi).getID();
double efixed = workspace.getEFixed(detID);
double usignTheta = 0.5 * spectrumInfo.twoTheta(wi);
double q = Mantid::Kernel::UnitConversion::convertToElasticQ(usignTheta,
efixed);
qs.push_back(q);
} else {
g_log.debug("Cannot populate Q values from workspace");
qs.clear();
break;
}
}
}
return qs;
}
/**
* @param workspace A reference to the workspace object that this data refers to
*/
void QwtWorkspaceBinData::init(const Mantid::API::MatrixWorkspace &workspace)
{
if(workspace.axes() != 2)
{
std::ostringstream os;
os << "QwtWorkspaceBinData(): Workspace must have two axes, found "
<< workspace.axes();
throw std::invalid_argument(os.str());
}
// Check binIndex is valid
if(static_cast<size_t>(m_binIndex) >= workspace.blocksize())
{
std::ostringstream os;
os << "QwtWorkspaceBinData(): Index out of range. index="
<< m_binIndex << ", nvalues=" << workspace.blocksize();
throw std::out_of_range(os.str());
}
// Fill vectors of data
const size_t nhist = workspace.getNumberHistograms();
auto* vertAxis = workspace.getAxis(1); //supplies X values
m_X.resize(nhist);
m_Y.resize(nhist);
m_E.resize(nhist);
for(size_t i = 0; i < nhist; ++i)
{
m_X[i] = vertAxis->getValue(i);
m_Y[i] = workspace.readY(i)[m_binIndex];
m_E[i] = workspace.readE(i)[m_binIndex];
}
// meta data
m_xTitle = MantidQt::API::PlotAxis(workspace, 1).title();
m_yTitle = MantidQt::API::PlotAxis(workspace).title();
}
