/// Retrieve and check the Start/EndX parameters, if set
void Linear::setRange(const MantidVec& X, const MantidVec& Y)
{
//read in the values that the user selected
double startX = getProperty("StartX");
double endX = getProperty("EndX");
//If the user didn't a start default to the start of the data
if ( isEmpty(startX) ) startX = X.front();
//the default for the end is the end of the data
if ( isEmpty(endX) ) endX = X.back();
// Check the validity of startX
if ( startX < X.front() )
{
g_log.warning("StartX out of range! Set to start of frame.");
startX = X.front();
}
// Now get the corresponding bin boundary that comes before (or coincides with) this value
for (m_minX = 0; X[m_minX+1] < startX; ++m_minX) {}
// Check the validity of endX and get the bin boundary that come after (or coincides with) it
if ( endX >= X.back() || endX < startX )
{
if ( endX != X.back() )
{
g_log.warning("EndX out of range! Set to end of frame");
endX = X.back();
}
m_maxX = static_cast<int>(Y.size());
}
else
{
for (m_maxX = m_minX; X[m_maxX] < endX; ++m_maxX) {}
}
}
/** Calculates the rebin parameters in the case where the range of the second
* workspace is
* entirely within that of the first workspace.
* 'Inclusion' is used in the sense of a set being included in anothre.
* @param X1 :: The bin boundaries from the first workspace
* @param i :: Indicates the index in X1 immediately before the overlap
* region starts
* @param X2 :: The bin boundaries from the second workspace
* @param params :: A reference to the vector of rebinning parameters
*/
void MergeRuns::inclusionParams(const MantidVec &X1, int64_t &i,
const MantidVec &X2,
std::vector<double> ¶ms) const {
// First calculate the number of bins in each workspace that are in the
// overlap region
int64_t overlapbins1, overlapbins2;
for (overlapbins1 = 1; X1[i + overlapbins1] < X2.back(); ++overlapbins1) {
}
//++overlapbins1;
overlapbins2 = X2.size() - 1;
// In the overlap region, we want to use whichever one has the larger bins (on
// average)
if (overlapbins1 + 1 <= overlapbins2) {
// In the case where the first workspace has larger bins it's easy
// - just add the rest of X1's bins
for (; i < static_cast<int64_t>(X1.size()); ++i) {
params.push_back(X1[i] - X1[i - 1]);
params.push_back(X1[i]);
}
} else {
// In this case we want all of X2's bins first (without the first and last
// boundaries)
for (size_t j = 1; j < X2.size() - 1; ++j) {
params.push_back(X2[j] - params.back());
params.push_back(X2[j]);
}
// And now those from X1 that lie above the overlap region
i += overlapbins1;
for (; i < static_cast<int64_t>(X1.size()); ++i) {
params.push_back(X1[i] - params.back());
params.push_back(X1[i]);
}
}
}
/** Calculates the rebin parameters in the case where the bins of the two
* workspaces intersect.
* 'Intersect' is used in the sense of two intersecting sets.
* @param X1 :: The bin boundaries from the first workspace
* @param i :: Indicates the index in X1 immediately before the overlap
* region starts
* @param X2 :: The bin boundaries from the second workspace
* @param params :: A reference to the vector of rebinning parameters
*/
void MergeRuns::intersectionParams(const MantidVec &X1, int64_t &i,
const MantidVec &X2,
std::vector<double> ¶ms) const {
// First calculate the number of bins in each workspace that are in the
// overlap region
int64_t overlapbins1, overlapbins2;
overlapbins1 = X1.size() - i;
for (overlapbins2 = 0; X2[overlapbins2] < X1.back(); ++overlapbins2) {
}
// We want to use whichever one has the larger bins (on average)
if (overlapbins1 < overlapbins2) {
// In this case we want the rest of the bins from the first workspace.....
for (; i < static_cast<int64_t>(X1.size()); ++i) {
params.push_back(X1[i] - X1[i - 1]);
params.push_back(X1[i]);
}
// Now remove the last bin & boundary
params.pop_back();
params.pop_back();
// ....and then the non-overlap ones from the second workspace
for (size_t j = overlapbins2; j < X2.size(); ++j) {
params.push_back(X2[j] - params.back());
params.push_back(X2[j]);
}
} else {
// In this case we just have to add all the bins from the second workspace
for (size_t j = 1; j < X2.size(); ++j) {
params.push_back(X2[j] - params.back());
params.push_back(X2[j]);
}
}
}
/** Calculates the rebin paramters in the case where the two input workspaces do
* not overlap at all.
* @param X1 :: The bin boundaries from the first workspace
* @param X2 :: The bin boundaries from the second workspace
* @param params :: A reference to the vector of rebinning parameters
*/
void MergeRuns::noOverlapParams(const MantidVec &X1, const MantidVec &X2,
std::vector<double> ¶ms) const {
// Add all the bins from the first workspace
for (size_t i = 1; i < X1.size(); ++i) {
params.push_back(X1[i - 1]);
params.push_back(X1[i] - X1[i - 1]);
}
// Put a single bin in the 'gap' (but check first the 'gap' isn't zero)
if (X1.back() < X2.front()) {
params.push_back(X1.back());
params.push_back(X2.front() - X1.back());
}
// Now add all the bins from the second workspace
for (size_t j = 1; j < X2.size(); ++j) {
params.push_back(X2[j - 1]);
params.push_back(X2[j] - X2[j - 1]);
}
params.push_back(X2.back());
}
/** Calculates the overall normalization factor.
* This multiplies result by (bin width * sum of monitor counts) / total frame
* width.
* @param X The X vector
* @param Y The data vector
* @param E The error vector
*/
void NormaliseToMonitor::normalisationFactor(const MantidVec &X, MantidVec *Y,
MantidVec *E) {
const double monitorSum = std::accumulate(Y->begin(), Y->end(), 0.0);
const double range = X.back() - X.front();
MantidVec::size_type specLength = Y->size();
for (MantidVec::size_type j = 0; j < specLength; ++j) {
const double factor = range / ((X[j + 1] - X[j]) * monitorSum);
(*Y)[j] *= factor;
(*E)[j] *= factor;
}
}
/**
* @param tofMin Return value for minimum tof to be masked
* @param tofMax Return value for maximum tof to be masked
* @param tofPeak time-of-flight of the single crystal peak
* @param tof tof-of-flight axis for the spectrum where the peak supposedly
* exists
*/
void MaskPeaksWorkspace::getTofRange(double &tofMin, double &tofMax,
const double tofPeak,
const MantidVec &tof) {
tofMin = tof.front();
tofMax = tof.back() - 1;
if (!isEmpty(m_tofMin)) {
tofMin = tofPeak + m_tofMin;
}
if (!isEmpty(m_tofMax)) {
tofMax = tofPeak + m_tofMax;
}
}
/**
* Get the start and end of the x-interval.
* @param X :: The x-vector of a spectrum.
* @param isHistogram :: Is the x-vector comming form a histogram? If it's true
* the bin
* centres are used.
* @return :: A pair of start x and end x.
*/
std::pair<double, double> WienerSmooth::getStartEnd(const MantidVec &X,
bool isHistogram) const {
const size_t n = X.size();
if (n < 3) {
// 3 is the smallest number for this method to work without breaking
throw std::runtime_error(
"Number of bins/data points cannot be smaller than 3.");
}
if (isHistogram) {
return std::make_pair((X[0] + X[1]) / 2, (X[n - 1] + X[n - 2]) / 2);
}
// else
return std::make_pair(X.front(), X.back());
}
/**
* Use the binning information to generate a x-axis.
*
* @param xValues The new x-axis.
* @param xmin The x-min to be used.
* @param xmax The x-max to be used.
*
* @return The final delta value (absolute value).
*/
double ResampleX::determineBinning(MantidVec &xValues, const double xmin,
const double xmax) {
xValues.clear(); // clear out the x-values
int numBoundaries(0);
int reqNumBoundaries(m_numBins);
int expNumBoundaries(m_numBins);
if (m_isDistribution)
reqNumBoundaries -= 1; // to get the VectorHelper to do the right thing
else
expNumBoundaries += 1; // should be one more bin boundary for histograms
vector<double> params; // xmin, delta, xmax
params.push_back(xmin);
params.push_back(0.); // dummy delta value
params.push_back(xmax);
// constant binning is easy
if (m_useLogBinning) {
if (xmin == 0)
throw std::invalid_argument("Cannot calculate log of xmin=0");
if (xmax == 0)
throw std::invalid_argument("Cannot calculate log of xmax=0");
const int MAX_ITER(100); // things went wrong if we get this far
// starting delta value assuming everything happens exactly
double delta = (log(xmax) - log(xmin)) / static_cast<double>(m_numBins);
double shift = .1;
int sign = 0;
for (int numIter = 0; numIter < MAX_ITER; ++numIter) {
params[1] = -1. * delta;
if (!m_isDistribution)
params[2] = xmax + delta;
numBoundaries =
VectorHelper::createAxisFromRebinParams(params, xValues, true);
if (numBoundaries == expNumBoundaries) {
double diff = (xmax - xValues.back());
if (diff != 0.) {
g_log.debug()
<< "Didn't get the exact xmax value: [xmax - xValues.back()="
<< diff << "] [relative diff = " << fabs(100. * diff / xmax)
<< "%]\n";
g_log.debug() << "Resetting final x-value to xmax\n";
*(xValues.rbegin()) = xmax;
}
break;
} else if (numBoundaries > expNumBoundaries) // too few points
{
delta *= (1. + shift);
if (sign < 0)
shift *= .9;
sign = 1;
} else // too many points
{
delta *= (1. - shift);
if (sign > 0)
shift *= .9;
sign = -1;
}
}
} else {
params[1] = (xmax - xmin) / static_cast<double>(reqNumBoundaries);
numBoundaries =
VectorHelper::createAxisFromRebinParams(params, xValues, true);
}
if (numBoundaries != expNumBoundaries) {
g_log.warning()
<< "Did not generate the requested number of bins: generated "
<< numBoundaries << " requested " << expNumBoundaries << "\n";
}
// return the delta value so the caller can do debug printing
return params[1];
}
/**
* Copy over the metadata from the input matrix workspace to output
*MDEventWorkspace
* @param mdEventWS :: The output MDEventWorkspace where metadata are copied to.
*The source of the metadata is the input matrix workspace
*
*/
void ConvertToMD::copyMetaData(API::IMDEventWorkspace_sptr &mdEventWS) const {
// found detector which is not a monitor to get proper bin boundaries.
size_t spectra_index(0);
bool dector_found(false);
for (size_t i = 0; i < m_InWS2D->getNumberHistograms(); ++i) {
try {
auto det = m_InWS2D->getDetector(i);
if (!det->isMonitor()) {
spectra_index = i;
dector_found = true;
g_log.debug() << "Using spectra N " << i << " as the source of the bin "
"boundaries for the "
"resolution corrections \n";
break;
}
} catch (...) {
}
}
if (!dector_found)
g_log.warning() << "No detectors in the workspace are associated with "
"spectra. Using spectrum 0 trying to retrieve the bin "
"boundaries \n";
// retrieve representative bin boundaries
MantidVec binBoundaries = m_InWS2D->readX(spectra_index);
// check if the boundaries transformation is necessary
if (m_Convertor->getUnitConversionHelper().isUnitConverted()) {
if (!dynamic_cast<DataObjects::EventWorkspace *>(m_InWS2D.get())) {
g_log.information() << " ConvertToMD converts input workspace units, but "
"the bin boundaries are copied from the first "
"workspace spectra. The resolution estimates can "
"be incorrect if unit conversion depends on "
"spectra number.\n";
UnitsConversionHelper &unitConv = m_Convertor->getUnitConversionHelper();
unitConv.updateConversion(spectra_index);
for (double &binBoundarie : binBoundaries) {
binBoundarie = unitConv.convertUnits(binBoundarie);
}
}
// sort bin boundaries in case if unit transformation have swapped them.
if (binBoundaries[0] > binBoundaries.back()) {
g_log.information() << "Bin boundaries are not arranged monotonously. "
"Sorting performed\n";
std::sort(binBoundaries.begin(), binBoundaries.end());
}
}
// Replacement for SpectraDetectorMap::createIDGroupsMap using the ISpectrum
// objects instead
auto mapping = boost::make_shared<det2group_map>();
for (size_t i = 0; i < m_InWS2D->getNumberHistograms(); ++i) {
const auto &dets = m_InWS2D->getSpectrum(i).getDetectorIDs();
if (!dets.empty()) {
mapping->emplace(*dets.begin(),
std::vector<detid_t>(dets.begin(), dets.end()));
}
}
// The last experiment info should always be the one that refers
// to latest converting workspace. All others should have had this
// information set already
uint16_t nexpts = mdEventWS->getNumExperimentInfo();
if (nexpts > 0) {
ExperimentInfo_sptr expt =
mdEventWS->getExperimentInfo(static_cast<uint16_t>(nexpts - 1));
expt->mutableRun().storeHistogramBinBoundaries(binBoundaries);
expt->cacheDetectorGroupings(*mapping);
}
}